I'm having a hard time figuring out what kind of small-scale adjustments they could make to AST in 4.3. My best guess is that they'll do something about mana costs or refresh potency on Ewer. If they mess with the mitigation/buff percentages, wouldn't SE be backtracking on their earlier stance on balance and bole being too strong?

Honestly, I wish they'd stir things up with the nocturnal sect (seeing how nAST just fails to interact properly with half of the AST toolkit). I enjoy the thought of having layered shields - not stacking shields with high numbers to cheese stuff, but a shield with several charges that gradually deplete when struck. Shields that could gain layers with TD and CO, for example.

But SE seems really rigid in their designs when it comes to healer and healing-related mechanics so that'll more likely be a 5.X or 6.X thing, should it ever come to pass at all.