|For those of you keeping track, that's seven new cast members since the season started, 11 since March 2012, and 15 since the beginning of Year 36.|
Good ol' Lorne, you can depend on him to sit on his butt until it's almost too late, and then overhire to overcompensate. Imagine how the past few seasons would have gone if the people they'd hired were of the variable quality of the 90's and early 2000's. There would have been a lot of bad post-hiring audition sketches on the show and blood on the floor at 30 Rock from the infighting to get on the air.
Lorne has been very, very lucky that almost all of those fifteen--including those he fired--turned out to be excellent comic actors.