I didn't play the map, but just looking at the screens...
The entire map is way too stark and plain and empty. It might provide an acceptable foundation as soon as you begin to start filling it in, but it looks really blank to me. Somewhere between 25% and 40% seems where this map should be. Start adding props and details, places to take cover... if you need to rethink the outside area a bit, so be it.
As you already mentioned, texturing is pretty bad in some areas (the entirely brick room stands out as really bad to me) - good to hear you're working on it.
Maybe a few shot-by-shot critiques as well:
The wall here between the stairs and the room looks horrible, it's like two inches thick. I'd break through that accidentally within the first day of living there.
Bland,
bland,
bland! These areas are way too open and visually uninteresting.
Across the last several screenshots it becomes truly apparent that 90% of this map is textured with the same blurry red-and-white brick texture.
Nowhere will you find floors and walls and ceilings textured brick. Varying the brick texture won't help - use some actual interior textures. Plaster walls and concrete walls, tile and carpet floors, plaster and concrete ceilings. Vary it up! Nobody will ever know where on earth they are when you just have a massive network of brick rooms. Each room should try to have its own style and textures (don't just replace ALL walls with plaster textures and ALL floors with carpets). Keep distinctive textures and props so people know where they're at and where they're going.
A lot of this stuff distracts from the actual layout, so I'll leave off here and simply say that you need to work a lot on texturing and variation and just detail overall. Use common sense - nobody has massive empty rooms bounded by brick walls and ceilings all over the place. Put some work into texturing and realism, add some detail, add some cover, vary it up and then let's see some more shots. :smile: