Ah yes the Headbutt direction bug... I tried to solve that once and failed. I can try again!
As far as his damage, his new passive can generally be kept up all the time and provides pretty decent later game damage output. Would you agree that if it dealt 200 damage per second it would easily make up for the loss of Damage (it doesn't, but for argument's sake)? I think there's a number there that would still allow him to be effective. The new Alistar might not be an effective bruiser, but maybe he can fill more of the traditional tank role.
I also feel his Triumphant Roar, while having a lower CD and cost, should not lower the healing done as well. I do not feel it is too strong at the moment nor have I seen anyone complain about it specifically in recent times. I like Triumphant Roar as it is, mostly the mana issue is the problem for me when I play him. I could see where not reducing the healing cost might become a bit of a problem with lower CD and cost allowing more spamming.