Not sure if trolling. If so please stop.
If the Jazz trade Jefferson and Marvin, they would just play Kanter, Burks and Evans more minutes. I think they have enough talent to still win games. They aren't going to win 70 percent of their games, but probably almost as much as they do now. They will still beat most of the bad teams in the league, and a few of the good teams at home. I think trading both of them will net 4-5 more losses max, and trading one of them would be maybe 2-3 losses.