How to fix WHM and AST

[Silver-Strider]

White Mages are fine for Healers who want to heal. White Mages are not fine for DPS who roll Healers who do not like healing.

Holy exists and counters your entire opinion by virtue of existing. You DPS so you don't have to heal.
AST is a better job for people that want to play healer than WHM due to having a plethora of oGCD heals and matching WHM's toolkit point for point where it matters while also having cheaper spells that have shorter cast times.
You can entirely ignore all of AST's Card mechanics entirely and just Benefic 2 just like a WHM and do better than WHM ever hoped they could simply by virtue of everything else in AST's kit.