I agree about the map being too symmetrical in terms of visuals. Do both RED and BLU both have to have identical train tracks, for example? I'm sure you could think of a different prop that would be the same size as that train car. The buildings, too, need not have symmetrical roofs, as it would appear the roofs on the higher buildings cannot be accessed. Lastly, I would consider removing one of those two great big bridges. Right now your level is not very believable because no real-world location would be that symmetrical.
Please don't think I'm being down on your map, though. It looks awesome, superbly detailed, unique, ect. I just think the above mentioned changes would make it look just that much better.