I'm going to address a couple points towards both of you, but know that I am with Sunny on all his points, especially the one that the bashers don't actively play.
On GW's prices. There have been economic savvy fans who have done price comparisons of their entire line. What was found was GW's pricing is within -/+3% of the Consumer Price Index. Basically, GW's pricing follows inflation. GW's main competitor Privateer Press has similar pricing per model. Their game just plays easier with smaller forces. Studies have also found that most gamer's (as any hobbyist can experience) have participated in gaming since childhood and thus have a nostalgic perspective of prices. Basically you remember that 20.00 box of Space Marines from your youth that is now 30 or 40 dollars...10 years later. The whole pricing thing is not a fact. GW has actually lost money off and on over the years and before you blame the Hobbit or whatever other thing GW did you don't like, they are a global company with a lot of moving parts and they are struggling in a world full of piracy, online auctions and recasters. The more that stuff catches on, the harder it gets for GW to turn a profit and the more they have to raise prices. People act like the artists, game designers and sculptors that make these products we love don't deserve to make a living doing it. They also act like GW has know clue what they are doing, but I've watched GW from the beginning when they were still selling other companies games as a distributor in the UK. I used to have to order my product overseas form their mail order! During this whole time they have been the top quality product, best system, best looking miniatures and coolest setting. Their product was supported the best. Even with all of the competition, all of that is still true. I see a lot of GW haters claiming they know everything about the company, but its all speculative and most of them don't know shit about running a multi-national wargame company. GW isn't perfect, but they get most things right.
40k is caught between trying to be a smooth running game and giving the entire fan base what they want. Some fans want everything 40k regardless of scale to be in the game, hence lords of war, flyers, etc. Other players want 40k to be a small forces, skirmish fire fight game. 40,000 started as a rewrite of Fantasy Battle, and its gone through major overhauls with each edition. Its been a natural evolution as 40k tries to find what it is. That is easier said than done. For example, 2nd edition bloated on the number of wargear, psychic powers and vehicle rules. Games bogged down in detail and characters were super powerful. Third edition boldly stripped away what was seen as to much detail and streamlined the engine of the game. 4th refined that. 5th attempted to overhaul vehicles. 6th brought streamlined the rules and incorporated things learned about 8th edition fantasy. 7th edition 40k occurred so soon and fast because the last year and a half 40k has filled out the entire universe with every supplement the fans have ever asked for. At the same time they are trying to bring forge world/ escalation all under one system and balance it. 7th edition is still the best edition of the rules for what its trying to do. Its a high quality product. You can fairly argue that 40k shouldn't have flyers, monstrous creatures and lords of war in it. But the fans love those models. GW is in a tight spot of where to draw the line and they are making a go of trying to get everything in. Its to much for me, but I get the appeal for the diehard 40k fan. A player can always choose to disallow what they don't like among their friends.
Alessio used to be my favorite designer. His work at GW was definitively some of their best. I loved hi Vampire Counts in 6th, his work on War of the Ring was amazing. Kings of War is WAY to water down and Mantic essentially is running behind GW and copying them or trying to fill niches that GW isn't filling. I would prefer to see Mantic do something more original or higher quality. But as of right now, the products they are making do not compare to GW's. I still respect him, but I think he is more a mechanics kind of guy and he thrived in the fluff rich realm of Warhammer's design studio. Kings of War is lacking a number of elements that make Warhammer great.
As for Nagash, I regularly play with him. Not test runs or mathhammer. I use the mother'f*cker. I build armies around him. Run him up against all sorts of enemies. I deal with solving his weak points and exploiting his strong points. Aside from being an incredible model any undead fan would love to have, he is awesome to play with and very well balanced. Nagash has interesting strengths and weaknesses that show who ever designed him understood the warhammer rules. Likewise, the Morghast actually fill two niches the Vampire Counts army needed filled. They are amazingly well designed units. Same goes for the mortarchs and the units in the Glottkin book. I consider myself a professional level player and know this damn game. I understand if you've never heard anything from me that you could doubt that, but considering how much worthwhile advice I give and how much I've learned from other great players found on here, its not like you don't know who I am. So when I tell you Nagash is viable it should carry weight.
So, my overview isn't primarily that there is to many spells. That is one of the problems. My main contention with End Times magic is the damaged the interplay between players. The poker game with baiting, tricking and pushing spells through. That area of the game is ruined with the D6 rolls. That is my main issue. I do think these set of rules is poorly done and I am surprised. The previous two books are good. But I still love Warhammer and I am hoping they can avoid a mistake like this again.
As for my long time involvement in the hobby. I still invest in my armies. Any time a new model comes out for one of my armies, I am likely buying it. I went through and replaced all of my skeletons with the new Vampire Counts ones. Same with Dire Wolves, Black Knights, grave guard. I like when they come out with newer, cooler models and will actually replace my old ones if I like the new ones better. I buy all of the army books, rulebooks and I play four armies - tomb kings, vampire counts, wood elves and daemons of chaos. I have owned (and played) High Elves, Dark Elves, Warriors of Chaos, Empire, Ogre Kingdoms. Only armies I've never owned have been Dwarves, Orcs and Goblins, Skaven and Bretonnia. I have always wanted to do a Skaven army, perhaps with the next end times I will. Point is, I love the hobby and the game. I've played most of the armies over the years and spend money on it regularly. Ironcially too, I have never felt like I have wasted my time or money when it comes to Warhammer. I enjoy investing in and sharing the hobby with my fellow Warhammer players. I want GW to succeed and continue to make a great game. I guess that's why I tend to use only GW miniatures and buy new from FLGS. I want the hobby to stick around. My point, I have a invested interest and I regularly put money into it.
I care about the health of the hobby. I want to see new players brought into it. I understand the difference between what is needed for new players and veterans. I know that without new blood, warhammer will die.
As for bashers not actively playing. When I play the game I set out to finish my games and keep playing even if I'm losing. I've learned valuable lessons and understanding of armies by doing so. I don't immediately start nay-saying or throw in the towel. i figure out how to play through and overcome. Through that I've learned how rules that at first seemed imbalanced aren't so much. Banner of the World Dragon being a good example. That same experience I have over the years lends me to know what is inherently wrong with the End Times magic. I didn't just bash it when I first saw it, I gave it an honest go and currently see very little options to the players rolling a D6 at each casting and each dispel. I don't see how 64 spells on a Mage Priest is good for anyone. Maybe that is the talk we should be having though. How do we deal with end times issues and find the fix.
But I play something before I criticize and I give it multiple shots.