Bonucci seemed fine and Italian media gave him a hard time, eventhough I for one kept praising him.
I think he's a nice defenders but I have 2 issues with him:
1) He is not worth 15mln
2) I highly doubt he'll make a good pair next to Chiellini as both of them are slow and clumsy quite a few times
That being said, I don't think we'll see them work great together, ever. And yes, I know CBs should be given time and I know Nesta - Silva took one season to adept but I still think these two won't take it on the next level.
Thing is, there are many Bonucci's on the market.