If we keep Gobert, it is important to surround him with the right pieces. He is not good enough to play with just anyone, but can absolutely be elite if playing with the right players.
Gobert can be a very impactful offensive player, but needs to play with someone that can deliver him the ball precisely. That’s the reason Conley and Gobert’s minutes were matched in the regular season. If Conley comes back the Jazz need to invest in a backup guard with highly accurate passing to fill in when Conley is hurt. Even better if that guard can defend as well.
The Jazz also need a secondary rim protector/rebounder. Ideally, it is someone that can play alongside Gobert and backup 5 as well. The Jazz do not need to go small to match small lineups, they just need someone other than Gobert to be capable of playing help defense. Better perimeter defense would help as well, but not as important.
Those two pieces do not have to be superstars. A backup guard and a secondary rim protector with athleticism. If you add those pieces, perhaps in replacement of Favors and Ingles, you should still have a good offensive team that is more versatile on defense.
If Conley leaves, you need another point guard that can get Rudy the ball. If you can’t get that it is time to think about trading him.