Tracer has a good point about the fades needing modified - they look too strong, and yet not bright. I think the reason for this is that you have set the render mode to "texture" and given them a high render fx value. Try setting them to render mode "additive" and giving them an fx amount of about 64 or 96, and see if it looks better. It should give a more subtle effect and yet feel brighter...if that makes any sense.
I still think those stairs look bad and could use a little more tweaking, basically by adding a trim. This coud in fact help around the entire map by adding them to all your walkways. I've included a screenshot of a little example I knocked up. Obviously it will increase the r_speed a bit if you use them extensively, but I think they are normally useful in adding a bit of basic detail to a level.
Otherwise, it looks as if you are using entity lighting only, rather than any texture lights, but I guess at this early stage its not a huge issue - its something you will want to look into for future levels however.