I am quite sure Bentaleb will go going in the summer, so we'll definitely need a new midfielder.
On the subject of Bentaleb - he fucked me off (and probably a few of you lot, too) a bit at the end of last season when he went public about his contract situation and how a lot of "big champions league clubs were interested". After eventually signing that contract, he started the season awfully. If you think back to the first few games he played for us this season, his performances were so half-assed and as if he thought he was the finished article. Sloppy passing, poor first touches, trying to be too clever in possession.
I could be proven to be completely wrong however, and he'll show character and fight his way back into the team. I don't see that happening though, to be honest...