Ah, I guess you like de_dust too

The T-spawn and the south west part of the map will probably never be the place of much action. Perhaps you can move the T-spawn a few squares closer to the center, and make the Western part of the map a little less complex; there is no reason to waste time on part of a map that is not going to be played. Since this will give CT a shorter time to get in position, you should probably make sure they have at least three obvious defence positions at each spawn. Make sure that CT can barely make it to these positions before T come rushing in.
The overpass will be used by T to quickly attack at the other bomb site, whenever T meet resistance. For that reason, you could make the overpass a bit more dangeros (e.g. make it possible for a CT sniper to cover some of the overpass. It will be like duck hunting, only with flash grenades and verry heavy hunting rifles). Dangeros overpasses are known from de_aztec.