Since aliens are strong in numbers, alien FPS players should be able to take control of unoccupied units using the map.
The current way will create a meta where people will create "crab highways" for players to get around quickly, which will ultimately just make the game laggy and clunky to play.
It would allow for alien players to be where the commander wants them present over running around in the middle of nowhere during a push.
#Alien swap.
slow valley
I personally think it's important that both sides FPS players have a chance to be where the action is happening if there is units in the area.