Personally I don't blame him, he was a bit part player last season, will be more so this year. Won all he can there. Time to get a pay day and game time.
I think he's bought in to Xavi's plan. He is a bit money-hungry, but he's always been worth it.
He said he always wanted to play for Barca and loved what they stood for; which, I can understand a Pole would feel that way after Germany then the USSR controlled them for 70 years.