I wouldn't be comfortable/interested over $13 million.
That being said, the length of the contract, and possibly the offer in general, would be contingent on really meticulous work with his medical files because there was absolutely something up with him throughout this past season.
It's a testament to his talent that he scored 40-goals despite the fact that his signature move back in his 60-goal season, where he cuts across a defender and then with an almost invisible release has this whip-snap movement to come out of a screen with a well aimed wrister; was essentially gone this year.
I don't know what the reason is for that suddenly being gone, but for some reason, and I can only assume it's medical, he wasn't able to do that anymore.
Logic would suggest it was a wrist ailment, but he played all season (and still scored 40 goals) and I don't see why they would make him play through a wrist injury, or how he could score 40-goals with a wrist injury. I really don't know what the issue is, but there's a reason why he stopped doing it, and it was way too effective a move for him to get rid of it for any strategic reasons.