Personally doubt that he would have played in anything than League Cup and the odd dead rubber type of game so he won't be losing too much by it. He seemed to get himself fitter than he has been (presumably at Guardiola's behest) and still wasn't getting much game, or even bench, time which I suspect, together with the CL squad omission, is what caused his agent to kick off.
Anyway, he'll no doubt either stay and see out his contract and pick up his bonuses, or will leave on a free in Jan. Can't see an apology forthcoming.