Trading Gallo (and keeping Chandler) was pretty much the only scenario that would have kept Chandler with the team, with our RFA contract allowing us to sign him for any amount.
Chandler had grown his ability to play 3 positions pretty well. I'd certainly enjoy him on the court over Jared Jeffries or the post-trade Landry Fields, both of whom are getting very ample minutes these days.
Moving to a broader topic, I think as much Jefferies is supposed to be helping out from a defensive standpoint, I think him being on the floor is a big reason why our offense is not as efficient as pre-trade. Previously, all 5 players on the floor could score (and would look to score within the system). Jeffries is dead weight. The Shawne Williams hand injury really broke the team - without his ability to shoot, he's another bit of dead weight on the offensive end.