Texture Resolutions seems low
A good portion of the textures look really low res, would be nice to have an option to raise the texture resolution. This applies more specifically to the floors, walls, and ceiling.
Christian Knutsson commented
The floors in particular seem to have this problem. Some of them load their full-quality version very quickly, but others stick to their initial low-LOD version and never sharpen.
Adam Palmer commented
When a new floor / wall / ceiling texture is placed, it first shows with very low resolution, but after ~10 seconds (maybe this depends on your download speed?), the full resolution image appears.