DA has liked Barnes, brought him in to work out when they had no shot at getting him. Just greasing with wheels for the future.
Now it makes sense from both teams, even if GSW take a hit for a couple weeks, it works out better long term. They're going after Durant. Barnes getting payed gets in the way of that.
C's aren't going to have a very good shot at Durant. Options at the wing are Batmun, Parsons, DeRozen, and Barnes.
Barnes has the most upside to all of them. Yes Crowder is cost effective, but he's also a Defensive straight line shooter(can't create his own shot), 3 pt shooter. He's a high end 6th man, and having him as our second best player is a bit scary. Don't get me wrong, I love Crowder, but the team needs some one that can get his own shot out side of IT and Turner.
He's also been on a championship team, something that would be nice to have, a guy with some experience. His numbers are also similar to Crowders and thats him being a 3rd or 4th option.
While I don't think this will happen, and not super excited to get rid of Crowder, I wouldn't cry over it. Has a chance to be a great move by next season.