@Riot: Are there are nerfs incoming for Alistar soon?

I've been hearing a little chitter-chatter from players that Alistar may be a bit overpowered right now. I wanted to have your input about it. I feel like Alistar is keeping champs like Leona, Thresh, and Blitzcrank in a reasonable state, which is why there's so much out-cry against him. Not only that but he can tank roughly eight or nine turrets shots and live once he hits level six, so his diving potential post-level six is unreal.

Peronally, I think if you reverted the ultiimate buffs you gave Alistar last season he would still be a decent pick. For those of you who don't remember, prior to buffing Alistar's ultimate to constantly reduce damage by 70% at all ranks, his ultimate used to scale based on the ult level (Rank 1: 50%, Rank 2: 60%, Rank 3: 70%). Alistar players would have to calculate when they could go in and for how long they could pull it off if that change went though.

I also feel like that if his ultimate buffs were reverted that you'd have to compensate by buffing something else about his kit whether that be his sustain or passive.