I think a great way to fix SCH (and SMN at the same time) would be the removal of aetherflow and the heals requiring it and give both something completely new instead (or in SCH case, let at the very least the Fairy Gauge be the Main Focus of the Job) so that SMN can finally be cut off from Arcanist and be on its own (and give SMN a new combat stance/job emotes while were at it, i know its a minor thing but it always annoyed me how SCH and SMN look the exact same when having their Books "unsheathed").

Honestly speaking, even with Endwalker coming soon at our doorstep as the climax of the hydaelyn/zodiark arc, the thing i am most hyped about is not the story or any of the sidecontent, but instead the patchnotes which tell us how Healers will turn out, and hopefully for the better for once.