I think SCH's kit is more fun to play with than Noct AST (even though AST is probably more powerful). Using Aetherflow stacks wisely, optimizing Chain Strategem and Deplo, and managing the fairy are more exciting than cards to me personally (Lightspeed being really niche because of it lowering damage also sucks too). This might be the perspective of a slightly bored raid-level AST who has played the job since it launched with HW, though.

It's still so unfortunate to me how much of WHM and SCH's balancing woes come from how awful and half-baked AST was as a healer concept.