wallwalk seems fine.there are a couple if minor issues.
in alien default, from the overmind, the opposite wall on the right, by the ledge - it is possible to somehow get stuck for an instant while attempting to wallwalk.
the protruding lights you clip through - one of these managed to glitch my view, forcing me to look straight down, spinning me ~90 degrees, and launching me from the wall. this was not easily reproducably, though.
there are various spaces that are inset from the surrounding walls. while most of these are not really deep enough to matter, i'd still suggest making the inset only a visible inset, the surface should, in my opinion, be totally flat.
all of these are really minor issues, overall i feel this is a fairly well designed map.