Gameday was the first time I got to actually run around in your map. I'm really impressed with the texturing and shape on the displacements. I didn't think they could be made that round and flowing. What it really came down to was there was lots of ways to explore and it left a really good initial impression.
Gameplay wise I was definately sad when the map switched. I could have easily spent much more time finding all the ins and outs. While on D that major corner from the canyons to the houses looked like it would be difficult to defend, but we managed to hold them pretty well. But then on O we just stomped right through. Definatly wanna see that a few more times before coming to any crazy conclusions.
I noticed your map was still around the 50M mark, earlier in the thread someone said it was displacements, but it's more the lightmaps on the displacements that make the filesize huge. (I think this was mentioned before also) What you might want to do, is just batch change all the lightmaps to 64 or 128 to check where in the best case your file size will be, and then add back nice lightmaps on areas that need it.
Anyway keep on rocking, I look forward to playing your map again!