Henderson needs to improve massively. He has this injury of course, which isn't helping but I wasn't really at all impressed with him last season either. He does a lot of the running, but does he ever really win the ball back too often? I'd love to see some stats on that.
I'd have Can in the team before him every time. Can is better on the ball, a lot braver with it, can carry it forward, puts himself about, loves a tackle and in time I think he'll start scoring more, too.