For me if one looks at the team's salary situation and fit it looks quite clear that Favors is the odd man out. Not because he isn't good, he is very good. But because in terms of best fit of your best players together, out of Gobert, Hayward, Hill and Favors, the combination of 3 that in this modern NBA will be the most efficient is Gobert, Hayward and Hill.
If the FO tries to resign Hill and Hayward they will get if not max, close to max or let's say "big" contracts, and you need to keep depth around them in the meantime as well.
It depends on how the season goes and injuries, but I would expect the FO to try and cash out on Favors nex summer or risk losing him for naught the summer after that.