Assuming Young comes back within about a week and plays well enough, I think the OF depth is good enough to move him to someone who thinks he's a cost-controlled MLB regular and will pay accordingly. Be nice if he could hit .250 with a .320+ OBP and steal bases efficiently. I don't move him aside if they only offer 4th OF/defensive specialist compensation.
Rosario could be moved right now if there's a team that wants righty bat playing 3 IF positions.
Bell and Lowe need to hit well over a stretch to get decent offers, but I'd move at least Bell this year for almost anything if it makes the roster more rational.
Soroka of course should be dealt; it's just a matter of timing. Only if would be somehow if this team contended for the WC at the trade deadline and Soroka is our #2.
I'd not trade Williams. Either he settles down and becomes reliable in the rotation, in which case he's useful here this year and next, or he's moved to the bullpen, in which case he's over-priced and not dealable.
The bullpen arms that will be FAs next year (Chafin, Law, Finnegan) may end up having some value.