I know we always seem to blame the writers for the quality of the show being a little subpar this season, but here's something to think about.
During the previous seasons, the actors worked five days per week, for three weeks straight, and then took a week off. This past season, the actors didn't work on Mondays. This meant that the first table read of an episode's script wasn't until Tuesday. In the past, the table read would be on Monday, and then the writers would spend a lot of Monday night rewriting the script to make it better after they had seen which jokes weren't going to work, but due to the lack of actors on Monday during the sixth season, the writers had one less rewrite night to improve the script.
Also, the actors recently demanded to be out by 10PM on Friday nights (filming nights). This meant that when jokes bombed with the studio audience, the writers no longer had the unlimited time they needed to rewrite jokes at a filming.
Anyway, I just wanted to point out that the blame can be cast in other places, too.
Larissa (who thinks these actors are paid pretty damn well for working an average of 12 days per month :)