Just tested (alone) the playground. Here are my two cents advices:
- Overbright map are not a good idea. Trem need some dark areas for alien tactics,
- it looks a lot like ATCS: 2 routes to find a symetrical enemy camp. Maybe rethink the way each camp can be reached and add routes and extra rooms?
- textures are monotonous and not always applied correctly.
- roofs: they are very flat and almost always the same height,
- architecture: brush work look ok, but when adding details like pipes it may need more detailled structures and not end up in a flat surface.
- detail: alien base is not secured even against one human.
/me goes back mapping...