Yes, it's a sensible point. He's so big, and plays with such stamina and bursts of power that i think he needs to be rationed. He's looked great in the pre-seasons, in fact he often looks great after an absence. I get the feeling that he doesn't like being on the bench, to be honest, though.
If he is playing from deep, and it's been 4 seasons now that he has, he needs an absolute bundle of energy alongside him and around him, to mop up and cover when he pushes on. I think Delph and (hopefully) DE Bruyne offer this in spades.