SCH and WHM also had the balance axis of single target (SCH) vs AOE (WHM) in ARR that no longer exists based on how differently they played around cleric stance
I’m not a massive fan of the shield/regen split because like every “split” in the healer dynamic in 14 it basically just becomes “okay who is going to be SCH’s partner” but if tanks would play along returning the single target vs AOE balance axis may be an option as well, when all healers don’t have do to everything they have more room for damage