Why is the healer class basically a one spell dps class?

[Imora]

So how the hell do you play AST now? The cards all do the same thing now?

[SpiralMask]

So how the hell do you play AST now? The cards all do the same thing now?

correct.
all cards are now a ~3-5% damage increase (depending on target), cannot be modified anymore tmk, and eating cards only serves to mildly increase this damage bonus. this all feeds into granting a sub-resource that allows you to grant another marginal damage increase beyond those, and the "complexity" now lies in assigning the right color card/lucky charm to the right class archetype to gain this resource.