Taric's change on Q mana cost doesn't help him at all.
His Q is the last thing you should max, which means that by the time you put two points on it as to benefit from this mana change, you have enough mana as to not care that much anymore. He suffers from mana costs in the early stages of the game and you kept his Q mana cost exactly the same with one point. So yay I guess. Way to "show some love" for Taric as you stated in the Patch notes.