There are some Kings Fans for whom "efficiency" is the end-all and be-all. Sure, Cousins went for 33/17/3/4/4, but he didn't shoot it well, ipso facto, he had a crappy stat line. Or something.
Efficiency is incredibly important. There's quite a big difference between a player scoring 40 points on 20 shots (amazing game) and a player scoring 40 points on 80 shots (incredibly crappy ball hogging game). These two are differentiated by their efficiency, and if you only look at points you'd say both were great.
The bottom line is that you want to score as many points per possession as possible. And the league average is to score 1.07 points per possession (the Kings are a bit better on the season at 1.08). If you can't score at that level, then somebody else ought to be shooting. Cousins scored 0.92 points per possession tonight. Players who are marginally MORE efficient for this season than Cousins' night tonight include Kendrick Perkins, Austin Rivers, and Josh Smith. I think Cousins deserves a little bit of criticism for his shot selection tonight. It wasn't good.