This map needs to have baseboards in the rooms, trim and such to help identify where the walls begin and end. The path one is on should be visible to the person taking the path. I had trouble finding a door way because the whole room at one point was the same texture as the doorway and textures in the exiting room. You should think of putting lights up in halls, especially long halls, one every so many feet. Thinking about door trim, most maps have that or some special lighting which enhances the entrance/exit areas.
I drew some lines to make it more obvious how a room could benefit from trim. I put some large circles blotted in areas to consider how a room might have beneficial lighting variances for appearance sake.
[attachment no longer available]