The supersaturate colours are a little too much. A hint of colour can go a long way.
There are a number of dead-ends and long corridors. The teleporters help a lot here but maybe the ones that put you at the main action area could be adjusted a bit.
The MegaHealth does pull the game play focus. I wanted a quicker way from the main lower floor to the middle and top area. For example, swap the main area lower teleport to a jump pad to keep people in the game more. Under the green "church" window, a jump pad to the top level (maybe).
From the medi-kit, short cut to the long corridor above and maybe shorten the long "back" corridor.
Punch a hole from the lower main floor through the wall and create a short corridor with a 90 degree bend to the red fog pit and add a launch pad up to the RL.
The lightning gun / ammo combo may not be in the right spot.
It is an enjoyable map and I had fun but does feel a little dated. This could be just the colours and long corridors.
Edited 3 days after the original posting.