My first thought is that it really needs to be shrunk..some parts of it are so wide-open, that it's a railgun paradise for the most part. I'd say in that thought, that you should remove the railgun, but what map is any good without a railgun.

Throw it in the washer and dryer and squish it down. Q3shw22 is pretty wide open also, which makes it a tough map...this layout kind of reminds me of that same idea.
There are some dead-end area's also like the bottom of the RL curved walkway from the bottom, and the small area where you put the the 5% healths at. There are other ones also, but I can't remember where they were right now....but, at this point I don't think it matters all that much. I figured I'd mention it nonetheless.
Some good/original idea's for the layout though.