https://www.twitch.tv/videos/2672688485 at around 1:26 has my stream video and voice chat from when we played. Note that the VOD will only stay live for a few more days, so watch it quickly for feedback! People seemed to like it. There are a lot of paths to get lost in. That can be a good or bad thing depending on who's playing. Felix commented that his younger self would love just wandering around getting lost and finding multiple paths, but I feel like the more straightforward maps tend to be the most popular. I think a lot of players get annoyed when they can't find their way around.
For me, the biggest confusion factor is that you have 2 identical low mid areas that are actually different, but mirrored (area with the metal team bunkers, pipes, and puddles of water). I would suggest consolidating those into 1 single low mid path. With that, you could also balance the path lengths to be shorter so the main center path isn't so much faster. Low could be a straighter shot with some branches to the other base entrances. If you absolutely must keep both paths, at least theme one to look significantly different so it's obvious what path you're on. Maybe have one rock and one with wood or something. Also, it took quite a while before I even realized there was a 2nd flag. I only saw it because I spawned by it. It's hidden away in a little tunnel that doesn't really look like a main path. Not sure it's really necessary, to be honest, especially with the player counts we have these days. The mid part seems fun. I think it'd be pretty enjoyable if you streamlined the low path(s) to play more like that as well.
Some of the lighting looks a little funky -- are you using the ericw tools? Maybe it's just the way the point lights are placed. Perhaps if there were light fixtures to emit all the colored light it would look more natural.