I hope they cut back on magic to be honest. As a long time Fantasy player magic is part of what killed that game. Rank and file turned some people off sure, instantly getting units wiped out in combat res was dumb, but it was magic that made people quit playing. It was subject to power creep more than anything else, and for the most part if they dedicated an army around it, there was nothing you could do to stop it. Dispelling hardly worked aside from scrolls, and basically you just waited for them to spend their dice on their biggest most scary spell and threw all your dice at it and hoped. That was all you could do. I fear AOS is going the same way.
Take the new Tzeentch book for example. A completely magic focused faction. Ranged mortal wounds. Mortal wounds for every magician around my units. The ability to replace my casting dice with the highest so my magic always works. And other than getting super close to dispel, or getting lucky killing the wizards early, there is nothing you can really do to stop it. emphasized the last part because that is what really will drive new players away. Its uninteractive, its punishing, and as the person on the receiving end, it drives home a feeling of negative play experience.