Could taric recieve some minor buffs
All in all I was fairly happy with the rework except that atleast early game you lack mana sustain to be a battle healer like he was intended to be.
The buffs are nothing major just some extra mp5 and mana growth or a decrease to the cost of his abilities namely his Q. If the Q cost was decreased i don't see why the base heal coulnd be nerfed as long as its HP scalings uped to compensate
edit
another idea i had was that proccing his passive on champs either gave him increased mana regen or just a flat mana gain

or 