Just thinking about this but... for this specific map, you could possibly break it up into parts. When I was watching the video I instantly thought that if you had the spawn points on opposite sides of the map, much like Danger Canyon, then it might work a bit better for the section that I want to break off.
I want to include the first part by possibly making the bridge a bit wider then creating another bridge that requires a bit more skill but reduces lap time, and then also widening the walkways onto the Beacon, and put a nav at the far end (the end that's closest to the giant hole). You could just close off that giant hole by using one of the walls in the giant corridor.
Throw in some teleporters, a place for a flag ( I'd suggest at the far end of the beacon and the other near the dropship), and a spot for the oddball and there ya go... It's not too big, but also not too cramped.
You'd still need to put a ramp so that you can get back to the dropship from the beacon. Might be able to take one from Danger Canyon and just lower it into the ground? -isn't familiar with HMT- v.v
Just my