Honestly, I'm very curious about the AST rework. They play things way too close to the chest (which is sad because once upon a time, they didn't'; the "Letter from the Producer" started with a spirit of openness back in 1.X which is what made Yoshi P so loved in the first place). But I think whatever they do with AST will be pointing the way forward for healers overall. So if nothing else, just seeing whatever it ends up being will be the big pointer to what they plan for healers to be in the future.
I feel like SGE kinda did that, but it's also a bit of an odd duck at the same time. But as the AST rework is specifically planned to be major thing to get AST in whatever line they want healers marching in, I feel like it'll be more key somehow.