here's the thing...he is a mere complimentary player, and since the injury is not a go to guy anymore...also, it's all talk until you sign and stay...
he can go somewhere else and we will be fine...draft a SF wing, sign a marquee name, one bench player...
Hernangomez is more than a replacement for Gallo, keep Chandler; make Barton the 6th man off the bench...start Murray, Harris, Chandler, Jockic, and Faried; bring Hernangomes, Plumlee and Beasley and Barton off the bench. Trade Mudiay, Arthur.  let Nelson go
sign two draft picks
sign tow free agents

Now, if we get  a marquee name, instant starter, and one strong bench presence...
FOr instance, sign Westbrook, play three guard sets... even subbing that way
if sign Andre Robertson, three wing set and two post players
If sign Heyward, then three wings and one PF, one pivot player (Jockic)

that's my take
hope it works