I think WHM identity is being THE healer which mean powerful heals for every situation. AST had been buffed so much they lost control over it but it's clear that wasn't their original plan.
So I think the revamp of the battle system and with the new skill will give them the chance to highlight it again.
WHM: big multiple heals + HoTs, burts damage for when no heal is needed
SCH: shields, healing pet and MP to allow persistent DPS
AST: buffer with versatilite healing set
New healer: a debuffer with emergency heal and strong DPS(?)
I expect that the more jobs they add the more it'll be easier for them to focus on the identities of each healer. The same goes for tanks.
