Hill reminds me of Dez Bryant, and that's not a good thing. I wouldn't call Dez lazy, as he would play with just totally reckless abandon when the ball was going this way. No one wanted that first down more than Dez. But he'd mentally check out if he wasn't getting thrown at, or would lose his cool when CBs started jamming and getting up in his face, or blow up on his coaches on the sideline when things weren't going his way. And then he never developed technically past his rookie year, so I don't think he was exactly giving it 100% in practice.
When I see Hill consistently sprinting 30 yards downfield on film, even when he has no chance of making the play, then hear about how he's getting benched because he loafs in practice, it just reminds me so much of Dez. It's that same sort of selective effort, probably brought on more by immaturity than apathy. Ronnie Coleman famously said that "everyone wants to be a bodybuilder, but no one wants to lift no heavy-*** weights!". Same kind of thing here. If you want to be a star football player, you need to put in the reps in practice or you'll become a has-been real quickly.
The problem is that this is a 22 year old who now has millions of dollars after his signing bonus plus a world of enablers. I don't know anything about Hill specifically, but my odds for any immature young man to grow up in that kind of situation are slim.