I went ahead and got rid of those catwalk clips, and I'm working on a 3D sky plus some extra detailing. Just fyi.
Also, I wanted to take a little time to try and explain why I'm so hesitant to change anything about my map's layout at this point. I think the best way to do this is with some statistics and reasoning, so here goes.
First of all, and I think this is the most compelling argument I can make, the red/blu win ratio is exactly even. I've checked this ratio after each b0 test so far, and every time it's ended up being exactly the same. There have been 32 rounds on b0, and 6 of those have either a very low playercount or no players at all. Disregarding those rounds still leaves me with 13 red wins and 13 blu wins.
I'm not trying to say that 32 rounds is enough testing to be totally certain that balance is perfect, but I don't exactly have months to gather as much data as I can before this contest ends. I don't want to make any layout changes that could end up causing problems, especially when things already seem pretty good as they are.
You could argue that the stages themselves are unbalanced, even if the map is balanced overall. I'm a lot more worried about this, but so far, out of 28 populated rounds (17 of which are on the first stage), stage 1 has only been defended 5 times. Stage 2 is about even with 5 blu wins and 6 losses. I'm pretty happy with these results, since it means stage 1 is only defended about 1/3 of the time, and stage 2 seems pretty fair for both teams.
Again, I realize that 32 rounds isn't really enough to be certain of balance, but I think it's enough to prove that nothing is horribly wrong.
EDIT: Playstuff did a test earlier today, added another 6 rounds to the total. Blu won all but one round, bringing the total to 17 red wins and 21 blu wins. None of the rounds had more than 10 players, and most of them were new to the map, so the issue could easily have been something unrelated to the layout. It changed the ratio some, though.