I can't really understand the Barça move, given that every time he played against them they were far too fast passing the ball around him in midfield.
That said, I feel that most of his problems in a 'holding' capacity last season were due to him having to push forward and provide creativity in an otherwise entirely turgid midfield and attack, that simply wasn't able to create chances. Again, not the only thing, just a big part of it.
In 08/09 & 09/10 in particular, I thought he played excellently in a much more withdrawn role than he ended up in by 2012.