Replacing a player of Richardson's caliber with a rookie is going to hurt them in the short-term. Without Richardson, and with a healthy Dampier back, the dynamic changes immediately. They're going to probably only retain one of Barnes/Pietrius, they can't use the TE to land KG, and while Wright will probably go on to have a productive NBA career, expecting him to duplicate Richardson's production right away isn't likely. The Italian is unproven. If Nellie doesn't get his raise, and with less talent overall, he's going to go through the motions next year. The Warriors have gotten rid of some bad contracts but Richardson-Wright is not an even swap at the moment. Baron Davis was their best player in the playoffs, but they didn't take off until Richardson was healthy again. He carried that team into the playoffs.
A lot is riding on whether they're done dealing and if Nellie comes back. So far this off-season has been a big step back for them, and they can probably only salvage it with a KG trade. We'll see what happens next year, Nostradamus. For now anyway, the Warriors are less of a threat to the Mavs than they have been. That was a pure talent and salary dump. Period. They have the rest of the summer to make it back up, depending on what they do.