Noah is way overrated, IMO. You don't trade away your nr. 1 scoring option for a 'decent' Center. Dalembert + Martin for Noah + Korver? No thanks ...
No, I wouldn't. I'm a big Noah fan, but he costs too much money. I'm not paying for a rebounder/defender when we don't have the pieces to contend. I would rather tear the team down for cap space. Not because I think we will actually convince anybody to come here, but because I think we need to draft high.
In all fairness to Kevin, he's having the best defensive year of his career and the Stuckey-Gordon backcourt duo exists (as does Chauncey Billups' decaying corpse, Nash, Thornton, etc). He's improved to the point where I don't think you can say that anymore, which doesn't make him good, it just makes him good enough that he can make up for it on offense. 20th percentile among rotation players instead of 0th, if you will. (However, I understand your point about Lee, he represents a trade-off of reduced O for increased D).