I know it's satire post, but I think they should make healers into support and offense and just have /less/ healing spells overall. For example SCH and SGE could be more offensive focuses, bringing back more of the offensive spells and fairy help, empower kardia and kardia related mechanics, remove some healing spells if needed for button bloat, definitely add more damage style spells. Then WHM and AST would get more support related damage- empowering the card system, adding built in balance where needed like buff player damage up to X potency, make damage through your friends (like stoneskin, when it breaks deals damage, or if it expires), etc.

They would ultimately be roughly similar output.. less healing spells though still obviously there. For those who still want to be healer for team spirit vibes would be support style, and those who were liking things like original SCH would have that too.