I think he could still succeed in a sheltered middle 6 role on a contender where he is being propped up by excellent teammates, he has always had a goal scoring touch and I think if he got a chance to play in say Colorado or Tampa with some really skilled linemates he could put up ~35+ points.
The reality is though that Detroit doesn't have the type of depth or talent to prop him up. He started out really hot last season before falling off HARD, he is a passenger at 5on5 and has been for multiple seasons now. I wish him well and hope he gets a shot on a contender.