At this point in Alpha I've not really seen any two story UFOs or other alien installations yet. All I've seen are the stairs in the Farm map barns and the metal stairs in the industrial buildings.
Still, I've no doubt they will be in there. After all the original EU1994 gave us ...
and apocalypse gave us this one
But considering the huge number of maps that could be modded into the game, is there a possibility that we could have the chance to modify the properties of anything ascending/ descending. For example, to have a number of different elevators, with a property to adjust the AP requirement of each?
So while in EU1994 the AP to use the elevator was 8TUs at all times, could something perhaps be able to delay/ alter this.
Alien UFO Grav Lift - 8AP
Corporate Building - 12AP
Apartment Building - 15AP
Colonist (Research etc) Facility- 20APs
and of course...
Freight Elevator - 30-40AP
This can be extrapolated into climbing directly up a manhole ladder or down and no doubt there are plenty of others.
Just a passing thought.