I agree with what you said 100%, but other people don't seem to. Maybe they thought Biyombo would be better and didn't expect him to have such a steep decline, and you also have a good point about Sochan as they probably thought they could get away with playing him at center a little bit during some games. Also, maybe what you said about the team being this good this quick caught them off guard. Maybe the FO thought they had more time to get a better player for that spot.
The young guys are ready now. When Udonis Haslem was interviewing Steph after the NBA Cup semi-final, he said he asked Kelly Olynyk how he likes it in San Antonio and he said something like (I'm paraphrasing) "These young guys can do everything UD, these young guys can do everything." UD said he never even answered the question about how he likes it in SA. lol. After hearing that, I kind of feel bad about looking to trade KO as he seems to really like being on the team.
I was also going to ask, is Yabusele on the outs with NY? He didn't play against the Spurs from what I remember. Is he injured, or just not in the rotation? If he's not in the rotation, how bad has he been? Has it been his defense keeping him off the court?
Very true about RWIII's contract situation. Just because he's making over $10M this season, doesn't mean anyone will play him close to that as a free agent.