It's a lack of personnel and players being miscast, not one player being a 'reason.' Expecting Kempe to be a 60-70 point guy to 'fix' the problem is the problem. You need to draft or trade for someone to fill that slot appropriately. Then, a rising tide raises all boats, guys start getting more assists, etc.
Personally I think we need more offense from the back end, and the true 2C and couple more top six wingers we need should be on the way.
Plus, in previous years, lots of it was systematic, you've seen the "kings offense tax" in action, but some guys never shook it off after Sutter. The guys that have become the problems relative to who they used to be are guys like Carter. Still effective, but his 'slot' needed replacing.