I'm thinking they should eliminate shield healers and regen healers being two diff kinds of healers and instead give every healer some form of direct heals, shield healing, regen healing and then to give each healer a distinct feel and play style have them focus on other things.

Sage: Direct Damage. healer who has the most personal damage and damage options.

Scholar: Debuffing. healer who has a solid number of debuff options to affect the enemy.

Astrologian: Buffing. healer who has a solid number of ways to buff his party more than just attack bonus.

WhiteMage: Mix of all three other healers. Second most personal dps, debuff spell like pollen slows enemy attack speed, buff thorns damages enemies when they hit players, all used with lilies.