I'll be honest I really liked the moves they made from a player standpoint and think they really strengthened their bench.
I'm not as optimistic. Beyond the obvious personality issue problems, I'm not sure how a trio of Rondo, Gay, and DMC will work given that the latter two are a bit ball-dominant and create a lot of their own looks. Also, who is their power forward? Their roster might not be totally updated online, but I'm not sure that they have an actual power forward on the roster lol Neither DMC, Koufos, nor WCS can play PF, no matter what Boogie says. Also, a lineup of Rondo, Mcelmore, Gay, Cousins, and Koufos has almost no spacing, with Gay and Mcelmore being average to maybe slightly above average shooters.
Cousins is their PF... He, reportedly, did not want to continue playing Center; thus, the drafting of Cauley-Stein and the signing of Koufos to starter money.
Cousins refusal to accept his optimal position of C might have been a contributor to Karl wanting to trade him. He's one of the most talented offensive players in the league, but at 6'11'' 270, how well is he going to defend opposing PFs? Will he accept playing the 5, if he can't defend 4s? Karl is a pace and space coach through and through, dedicating his philosophy to it before it became en vogue, how he adjusts to this roster and having to play DMC at the 4 will determine how well this Kings experiment works out.