Big Red Slugs
Captain Hook
Not necessarily because there are some other factors that the person did not consider and look more carefully between his first year and third year
2010-11 22.5 ppg, 12.1 rpg, 3.8 apg, but played 38 minutes and 50.FG%
12-13 18.0 ppg, 8 rpg, 3.7 apg, but played only 32 minutes, 53.8 FG
So while his numbers are down, they are down because he is playing less minutes, has more quality players to help him and he is shooting more efficiently. Griffin didn't have Billups and Chris Paul two years ago, so it is natural for those numbers to go down some with more help. He didn't Lamar Odom either.
In short this is a completely different team from two years ago, so I think it's a bit unfair to say he isn't as good of a player, but I do believe he needs to develop a better post game - that is a given
You're right about him playing less minutes, but your comment shows me that you didn't really follow the Clippers this season.
Billups didn't play much this year and Odom only started to come along in the second half once he got into shape, and even then Odom wasn't really stealing any time or points from Blake.
I think it has more to do with Blake being a one-dimensional player and the league has him figured out better now than they did his rookie season.