First of all we need to be patient and think about long-term.
I think Favors is unhappy and does not fit so him leaving and a stretch-4 starting would help everyone and mostly Gobert and Mitchell, so that's the only move we have to make short-term.
You can also feel there is a lot of tension around the team. Snyder's interviews are unusual. Something is going on, probably both in locker room and between FO - coaching staff. But we have no real media to report anything. DL should do something asap. I'd say just send Favors away, everyone knows he's leaving the Jazz this offseason anyway.
On the other hand signing some players mentioned around may tie our hands going forward. It's a stars league, we have two stars and one is on a rookie deal. We play terrible now but we have a bright future. We need to acquire a 3rd star, a strong offensive player ala Jabari Parker. That should be the main goal that everything should shape around. Other than that I'd be hesitant to pull the trigger unless an opportunity presents itself, e.g. an underrated/undervalued guy like Fournier who wants to play for the Jazz and is able to score 20 ppg becomes available. We'd not mind his contract, again we have a star on a rookie contract which helps tremendously financially. Mitchell - Fournier - Gobert + add a star either via draft/FA/trade, and we compete. I don't care about good players, sand how many of them we have.. depth means RS success only so everyone good is expendable.