I think it's the ability of the Kings to turn once tough players to soft ones (ie. Brad Miller, KThomas, S.Dalembert, Landry, Nocioni?etc.) and the lack of Kings to develop talent. I don't know but our players seemed not to develop and bloom into their best potential. It's either they get injured and come back a different player (Cisco, Evans knock on wood) or just didn't get the chance to develop (ie. G.Wallace). I'm pretty sure had we gotten Rondo on draft day and not Douby, Rondo would have been out of the league by now. Landry and Cousins are playing pretty well but i still remember how Landry played back from Houston now i'm afraid he may turn out to be K.Thomas 2.0. Not to mention players that left Kings and have played well afterwards (G.Wallace, KMart).
I understand Kings are in re-build mode and have young players to build around but don't think Kings have that knack to develop them to the best of their potential. Peja i know Kings developed but turned out soft, i still remember Peja vs. Dirk comparison years before as if they were at the same caliber. Dirk is still going and still is a star, Peja now a back-up to Dirk's Mavs team or a filler to injured players.
Kings should try to emulate or learn from Suns or Spurs training coaches. Imagine R.Lopez in Kings he'd be soft as a tissue by now and ridiculed in the boards for sure, in Suns he is a presence and clogs the middle. Blair, Neal, Hill in Kings would be out of the league by now but are solid contributors in Spurs league leading record.