I'll rattle off some guys I think are overrated....
Rondo (Hate to do this to him but he hasn't stayed healthy in 2 years, still can't shoot and someone is about to give him 90-100mm in 6 months)
Parsons (Can't guard anyone, Rockets played way more freeflowing than the Mavs will, wouldn't be surprised if he struggled more...Also seems like a huge douche)
David Lee (Just awful defensively, I think Kerr will play Draymond Green over him a lot this year)
Damian Lillard (This 1 will draw some raised eyebrows. He is clutch, fun to watch and always a threat to drop 30 but his playmaking ability for a PG is pretty bad and he just isn't talented enough on D to stop anyone. SG in a PG body, guys like this tend to get overrated.)