That's all fair. I'm not referring to an attitude issue though, more a matter of nature over nurture.
It's great that Shaw (along with Adnan I think) took a fitness coach on holiday with them. My point is he seems the type who would need to. Ashley Young probably wouldn't, he's built differently. Even in the pics you added, Shaw has some definition, but would struggle to be Ronaldo shredded I think. The likes of Rooney, Shaw, Carroll - probably all much fitter than they look but seem to have a tendency to lose shape easier than some others. I doubt Shaw is any less professional than any of his teammates, but we've already had a couple of periods where we have all agreed he looks out of shape since he's been here. I suspect there will be many more, as that is how he's built.