Interesting...In order to encourage fluffy builds?
Probably to make life difficult for
@najo I'd imagine.
No but really,
@Ghouly 's idea isn't bad, it's just the whole idea of work. For the designer, complicated rules require more and more work to balance and tweak and keep in line, as well as to devise and write them as clearly and in as short a manner as possible. Giving powers with different prices is potentially a bit complicated. And then there is a work load given to the players, of remembering different rules, possibly the issue of having to search different sections of the book to find the rules if it isn't laid out in as easy a method as possible, and even interpreting the interaction/effects of abilities. And it might seem like a designer is more responsible for the interpreting of rules, but players look to stretch sentences and words into what they are not quite often, either due to ignorance - inconsistent/poor writing on the designers side (Often a problem with GW)- or attempting to abuse rules - trying to make the rules do things they shouldn't (Rules lawyers or people just looking to bend rules).
Although if there were a list of powers without points, simply detailing the powers and what they do, and each power's price was listed in the individual models' codex entry then it wouldn't be terribly complicated (Save for potential edit/type-o errors reflecting incorrect points). So that really isn't too much of a stretch. The balance issue still exist though, and as
@Malisteen suggested, points prohibitive pricing is a simple way to stop powers from being combined, but IHMO it is a very ugly way to use the rules. Prohibitive pricing just looks bad, and it's silly because when powers are force multipliers (Like +3A or Re-roll misses), then other powers value is increased with those powers combined.
Then you get into strictly acceptable builds for Vampires (Blenders MUST HAVE X/Y/Z or Casters can't buy power X because then they can't take A/B together, etc), and if that is the case, then just print the rules with those builds as the assumption, and let people who want to make their army fluffy make up rules on their own. Because when there are strictly better builds that are clear enough that everyone takes them, then the rules are failing pretty hard. And there might be slightly different selections based on say, Meta, like "oh this power is broken good, as long as no one you play against ever takes anything with a save of 2+!" or army specific counters.
I'd rather make my own rules adapted to a situation I need or want, than to be told prices for powers that make my choices "Stupid" if you're trying to win, or incorrectly convey the message to players, as a whole, that the power is "Worth" a value that isn't true. But the basis of my argument here is simply that points are an extremely flawed system, especially when taken as the ONLY balancing factor for the game. And I'm probably the only person here who is willing to "fight" against the idea of points, since that is many players biggest gripe with
AoS. :ghost: