As others have stated elsewhere the current 2 man central midfield system doesn't appear to be working, that said his positioning is all over the shop. I think Rafa was right to say that he's not disciplined enough in that role. The only way I see this working is if he plays at the base of a 3 man midfield, sure Can and Allen are out, Lucas doesn't fit but BR could play Lallana as the third CM with a 3 man attack in front in the meantime?