I think it's more than just the PG situation. it's almost everyone Danny has brought in since the Ray/KG trades.
The only players that have really worked out were Posey, PJ (marginally--yes, a big shot at a key time but there were a number of games he didn't do a lot), House (for a limited time), TA (for part of this year) and Finley.
There have been a lot more busts than contributors: Sheed, Daniels, POB, Pollard, House (this year), TA (last year), BBD (this year--I count this year since he's no longer on a rookie contract), Giddens/Walker (even on rookie contracts I'm including them and I don't think they got a fair shake from Doc, they still didn't contribute), Landry, Nate, Cassell, Marbury and Mikki "Don't come around here no" Moore.
Shelden's in nowhere land. doesn't see much time, not spectacular when he does play but what do you expect for a vet min player. Scal sadly gets a pass since he pre-dates those trades.
The question is, is it Danny's fault that he's not evaluating talent very well OR is it Doc's fault for not getting the players in a position to contribute OR both?