I'm sure we could go back and forth all day, but I don't think that Laine is any worse than many other Jets at turning over the puck, in situations where it shouldn't be an issue. People just seem to have this expectation that since he is so talented in some areas, that he should be the best in every area.
I certainly want him to improve, because he has the potential to be great in all aspects of the game, but I would say that he is as good at the 200 foot game as most Jets are. I've yelled at my tv many times when one of our veterans or or one of our leaders turns the puck over in what should have been a simple play.
I'm not trying to say that Laine can't or shouldn't improve, just that I don't think his defensive play or all around play is as bad as you say. Definitely not bad enough to hold back a sky high contract demand, but again, I hope he sees the value of helping keep the team together, through reasonable contracts.