I like this map, but I would have expected more for a map thats so big (in file size). Only having 4 perks (one of which is the original double tap) is something that I would really like to see improved. I also would have liked to have seen some sort of texture for the ground when looking outside a window instead of just the black that you see now. A buyable/winnable ending would be cool too.
Other than that, I thought the map was pretty fun and played it a couple times with my friend and had a blast. Getting a train going is pretty easy in the main open area. We eventually downed ourselves though, it got rather repetitive