What change do you want to see on your main class for Endwalker ?

[LeonKeyh]

I'd like a reworking of how the AST heals entirely.

You're going to get your wish on this part, but not in the way you're asking for. AST will be a "Pure" healer and while they may have a shield or 2, they're going to be mostly direct heals and regens. I doubt that you'll see a large change to healing as a whole for a while.