Heres a bit of feedback for ya!
Lets start with the spawns and work our way out:
The spawnrooms are pretty good, I like the choice of being able to exit at a higher level which could help deal with spawncampers. However three spawn exits are quite a lot, as most king of the hill maps have around 2.
Moving out of spawn, the areas outside the spawns feel quite cramped, which I feel is partly due to the large pipes and low ceiling. Also the pipe in the center completely blocks the middle route from sight when exiting from the center spawn door which makes it look like there are only two paths to mid.
The area between spawns and mid also feels a bit cramped, I would suggest opening up more of the map to an outside environment and making areas a bit larger wouldn't hurt either.
Next, the force fields. I like the idea but walking up to them they looked like they solid and it felt weird to walk through them cause I felt they should be solid. Just my personal opinion, but I feel these could be better used as respawn room visualizers or similar. However if you do want to keep them maybe add some sort of indication that they can be walked through
Mid itself is pretty cool, I like the height differences around the point, with the areas above and underneath the point. However again it feels a bit cramped and there isnt a sniper balcony as such, just the far right enterance to mid, which gives the sniper limited vision to the point and not a whole lot else. Jumping around as soldier was also a bit frustrating as I kept bumping into the pipes which got in the way.
Again this is just my opinion, hope at least some of this is somewhat helpful