yes, dp is becoming a jumpmod 
You can expect Knack to make a post about that here anytime soon.
Back on topic, the map looks a bit too wide open. But that's only judging from the screenshots. I'm testing the map in a while, will edit post for extra comments.
EDIT: Alright, I took a quick look at the map. Sorry but I didn't feel like making screenshots, I'll try my best to describe what I mean.
- map is WAAAAY to easy to cap, I did a quick "trial run" and could cap at least 5 times in 1 minute.
- underground would be nicer if it were a lot darker, especially the hallways at the elevators on either end
- top of the fences on blue side in the underground are red
- having 2 spawn points on both above and under ground would be better than 3 above and 1 under (gives people more "incentive" to go underground)
- takes a wee bit more effort to go up the ladders on the sides of the top middle, suggest you make the clip brush cover the entire face, no one can really get stuck there anyway
- need to make the invisible brushes of the trees taller, I was able to jump on top and "become one with the tree"
- a cool idea would be to add invisible brushes to the tree branches as well, that would create some camping spots that COULD slow down the gameplay by quite a bit
