Not at all. He's rather lazy defensively.
I don't think that's true. There are plenty of players who are equally adept going forward as they are dropping back. Vidal, Marchisio, De Rossi (more of a deep-lying playmaker these days), Schweinsteiger, Toure, Boateng etc. It's valuable to have one player who can adequately perform the role of two.
If Cabaye goes, and I hope he doesn't, the best bet, imo, would be to play Anita as a deep-lying playmaker, a role he's best suited for, with Sissoko as one of two box-to-box central midfielders protecting him (we'd need to get another). Maybe Fer could be that player.
It's been open for over a month in England.
No. Only for domestic transfers. Ther International window opens July 1st in England. You can arrange transfers (Internationally), but they won't be official until then.
So yes then.
Yes, it's not.