To be fair, also other armies will find their banners useless.
Seraphons' banners add 1 to battleshock tests of enemy's units.
Empire's banners let their models stand on a roll of 1 on battleshock test, dwarfs' ones halve the number of fleeing models, and so on.
In skirmish, a lot of banners are underpowered or useless.
At least, Death battletrait still works. Order cannot say the same...
Regarding the wizard part, I think that Master of Black arts will become a useful command trait. A necromancer costs 22 (which is a lot), while (for example) I can field a nighthaunt warband with a banshee (16) that can cast spells, giving a save 3+ unmodifiable.
Battleshock is still taken, it's just as a warband now, so you might see some of those abilities that affect battleshock stacking.
As for Master of Black Arts, the command trait makes your general a wizard, but it doesn't say how many spells it may attempt to cast or unbind, rendering it useless. However, I wonder how Supernatural Horror is going to work. I imagine if any models from the warband are within 10" of your general during battleshock, then the entire warband is affected. I imagine Order still gets their trait, but it only applies to the warband as a whole.
It's $10. It's literally the cheapest GW thing you'll ever buy directly from GW. Screw the narrative if you don't like it. It's a 45 minute game that you can play with a handful of models nearly anywhere.It looks potentially interesting, but not enough to persuade me to buy it. It's seems like a reworked version of Mordheim to a certain extent. I just cannot get into the narrative side of Age of Sigmar. None of it is a patch on the Old World.