Nick, I've seen very close up, yes he has muscle bulk and is in my view carrying too much weight - but go back to what we know; his performance against ManCity for his previous club we one of the best I have ever witnessed, his performance against Villa (although Poch warned us he wasn't fully fit) was one of the best from a Spurs midfielder I'd ever seen as a debut - the pundits and most Spurs fans drooled over him.
He is not quick, but he does have pace and he can apply it but must admit he gives me a feeling of the touch of the Mido's about him - not playing, weight ballons and quickly affects his fitness - not fit enough in the first place and injuries become common.
His weight wasn't an issue for the club we paid #63 mill to, they got him fit, happy and playing some amazing football.
He's living in a hotel, now pretty miserable after he run-in with Jose after his injury and telling him he wasn't fit to play. So maybe his mentality isn't what it should be; he's a human being, not a robot.
Even against Burnley where he look incapable of running/chase down - by stats he was our best player in the first half when on the ball - it was off the ball where his contribution was miserable - there will be a reason for that, and hopefully the club will take a more rounded and professional view of it, without hanging him out to dry.