If he has a decent end of the season, sign him to a 24/3 deal with a TO in 2020 and everybody's happy. The average salary is more than fair in this market, it's not that long that he feels he's going to be losing a lot of money over the length of the contract if he gets much better, and it's at least movable in case he sucks or can't stay healthy and the Jazz need to add it to a future trade deal.