I always thought from the beginning that AST was meant to switch between Nocturnal and Dirunal Sect for versatility, which they gain in exchange for having lower potency healing. It would give the class some much needed flavor, increase skill cap, and provide a reason to actually use Nocturnal Sect. I do think it would improve their 4-man healing game, but might still need some MP adjustments. However, being able to switch stances doesn't really do them any favors in an 8-man situation, in any combination of healers; it would still be annoying to have AST/SCH with AST in Nocturnal. Hopefully, the card changes increase their utility power in 8-man situations, kind of balancing the scales a bit.