Clip the stairs with a ramp that covers each step, otherwise it's awkward to jump on them.
There's a missing model on both sides of the point.
Could do with some signs pointing to the cap, although it's not a confusing map.
It's cool that even within the rooms and smaller areas there's a bit of variety in the terrain - small ledges, scout routes, lowered areas with health in them, pillars etc.
It's generally a BIT dark indoors, especially the ceilings (not that that matters too much) but there aren't any points where you can't see what's going on.
Increase the speed at which the doors open - that's the actual brush entity part, I think? As a scout I ran into it as it opened. It's not a major concern but it's a bit annoying.