Ascension is a great map. I can see the direction they're trying to go in with the new maps, but they're incorporating way too many things now that make the maps unplayable. If it doesn't work and they don't have time to test these things, don't put them in. It seems like in BO2 it's all about gimmicks, and I can't think of one thing that they have added that have improved on anything in BO1.
The foot thing was an issue with opening it, the door was there to open, but it wasn't registering me hitting it. Hit it about 10 times from point blank range, still didn't open.
I really hope if there is gonna be more zombies, they keep the maps as simple as possible next time round.