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I would recommend you to add more screenshots, like the top-view of the map. The screenshots in this post makes the map look like a small map of few walls, when in fact, it is a much larger, more complex map than the screenshots imply. I hope that you do this rather quickly, because your map can potentially be flagged for "Lacking decent screenshots" and "Low-effort".
The walls, floors seems to be made in a tidy manner (perfectly fits in a 8 and 16-unit grid), so it's good that you did not use 1/2/4 grid-size. I'm not saying that you shouldn't use it. Instead, use that grid size whenever necessary, with extra care.
Since this is still a dev-textured map, my suggestion is to give this map a theme. This map already has a layout, so the only thing you have to do is to use a theme, such as dust perhaps, or just leave the map dev-themed.