Actually, both Gobert and Favors have a very limited offensive skill set, IMO. Gobert lacks touch and, unless is dunking, has some difficult finishing -- despite his size! Also, since his, let's say, "moves" are very very simple, he seems to get stripped quite often when the Jazz, to exploit a mismatch, try feed him in the post oftem. The good news are that he is an average-to-good passer (for a 5), plays with intensity and doesn't force things up. Favors, on the other hand, has been around forever and still have a very limited offensive repertoire. His "moves" inside are also very simple and predictable -- although not as much as Gobert's. Through the years, he has developed what I would call "a good touch" (at least for a 4 or 5) from mid-range, but that doesn't really put pressure on defense since he doesn't seem to be able neither to expand his range to beyond the 3 point line nor to fake the shot and drive to the basket -- as, for instance, Malone could do even at the twilight of his career. So, Favors can only dunk by being fed near the basket or take long 2s, a shot that all the defenses hope opponents take. Also, he seems somewhat lackadaisical offensively. The moral is: both of them are problematic and to have them on court simultaneously ends up cramping the offense unless the other three players absolutelly could not be left alone.
I also have some doubts about how much Favors and Gobert practice their individual offensive skills, since they seem to be learning those at a very slow rate. It is one thing to improve slowly when you are already good at something, but both of them are quite raw, quite basic. It's disheartening!