Scholar and healers in general need to have their secondary identity expanded on.

WHM needs to weave damage and healing better and have more abilities that combine both aspects. WHM is the damager of the three. No utility but enormous personal dps.

SCH should be the debuffing/enfeebling healer. Tactically use aetherflow to inflict potent debuffs to reduce damage done or increase damage taken. Then use the subsequent Fairy gauge generated to use the oCDs.

AST needs new ways to manipulate its buffs. Extend, spread or increase their potency.

Essentially, since healing/dps identities seem to be homogenized the devs should expand on the secondary support aspects of each job.