If he could stay fit for the whole season I genuinely think he'd not only be staying but play a big part.
Early on in the season last year he seemed to be one of the first players to really get what Pep wanted off the ball and put in some great box to box performances. Even after missing. The whole season his performance against Chelsea away was good.
He also seemed to be a really nice character to have at the club, so it's a shame things just didn't work out. Maybe he'll fix his injury problems somewhere else or at least get to a point where he plays every game he can when fit, being a rotation option with his injury record just doesn't work.