You may be using too much white light in spawn, and that wood wall texture works, but everything is a little samey in there. The floor, walls, and ceiling are both a creamy beige color, as well as the ground outside. The building exterior textures are a very faded blue, and I think darker, stronger blue metal textures might look better. The environment lighting settings also look pretty pale - the shadow ambient is pretty lite, as is the intensity of the sunshine.
Sticking to a soft color scheme is fine, I mean, this is mostly my preference, but it may cause a distinct lack in variation. For instance, in my opinion, you never want any lighting or details in indoor areas that look too similar to the outdoor areas - otherwise, the map ends up feeling homogeneous and has a sense of placelessness.
So I would prefer it if the sections you showed had more contrast going on, both in terms of lighting, and texture choice.
