I think stuff like "coward" is a bit harsh personally.
Last season at Man. United he was carried off with what looked a serious injury. Wasn't anywhere near as bad as thought and he was out there the next week v Southampton and hardly missed a game in the run in.
Today he felt his hamstring go so you're not going to stay on and risk significant damage as you can't run off those types of tweaks.
With his style he gets on the ball enough, my issue is he simply dosen't create or score enough for all his touches in final third although I accept the options infront of him are a long way from elite generally.
Perhaps the club would rather he goes on a free, I dunno but just seems another drifting example where player will just let his contract run down and put out o.k performances.