So far I am unimpressed with the update. The survival mode is kind of dumb. Feels to me like a rushed idea and is basically a rip off of Horde mode on Gears 2 except with a time limit.
The two new maps are nice for Versus as everyone knew all the good hiding spots on No Mercy and Blood Harvest, but really once people get accustomed to it I am sure people will continue to be cheap as hell.
Lots of glitches still not fixed. The melee fatigue sucks because it feels like they made the Hunter beefier than before. You cant melee him off as easily and now it seems like the damage he does is through the roof.
Overall just kind of unimpressed with it.