Uhh, all i can say, regarding looks, its not much of an improvement. Gameplay-wise, the open area's gonna get REALLY popular with the humans, of course, getting an entire team trough one entrance is going to attract the attention of ghouls, who'll gladly thin out the human population.
Aside giving it more detail maybe more then exit/entrance might do, but if they're wide i guess it still gives plenty of avoiding space.
The snow is a nice touch but it looks odd when there's snow on one sput but not another. :P
Oh, oh yeah, regarding the original inside area, it's alot better now, just those yellow candle things in the middle section get in the way, moving them more to the sides should work out better. If anything i learned in my map that putting them to the sides is better then middle. :P
(http://img41.imageshack.us/img41/4792/screenshotdoom200912130.png)
Its especially effective because melee ghouls will use the teleporter accidently while trying to attack, its basically a shield! They dont last long enough to turn around and attack either.
(http://img41.imageshack.us/img41/6213/screenshotdoom200912130l.png)
Oh, and that brown area is REALLY bad looking, maybe detail that up a bit if thats possible. :P
EDIT: Uhh keeping it simple, i guess the new one is better off being used. But it still needs work.