Nice. Here comes the meat:
1. I love the layout of the building. Will there be more substance to the other building or that solid block on the back?
2. The shed looks pretty easy to clear. Perhaps more clutter/cover for ET in there? I like the grenade friendly walls thought
3. The stairs to the right of the Apotheke look a little wide, especially on the outside of the building. Love the multiple roof access though. Also, the other staircase ... Red carpet to the roof? I would expect a steep steel staircase behind a utility door.
4. What happens if you miss the turn at the top of the stairs on the right? Do you just get stuck back there? I can see aliens doing this, and that would be just too easy
5. The wall texture inside looks very uniform. Maybe something to break up that uniform texture. Perhaps paintings or wall mounted light fixtures.
6. I don't know how big a UGV is, but I suspect 4x4. Perhaps if the bollards at either end of the pass-through were closer together and only infantry could go through there it would be more interesting. No way to tell until we have UGVs though.
7. Maybe more retail space in the Apotheke and less behind-the-counter space would be good. Especially couples with more of those kiosks.
Now to play test it.