Hunters can not beat micro'd gauss unless you heavily outnuber them, because it takes so much time to aim.
Gauss destroys air, owns infantry and gremlins kill the only viable options, tanks.
Look at C&C, the units that do a lot of damage quickly are the slowest units in the game.
Gauss kills your base before you can so anything.
As stated on team indecisive the nerf should have been to take away building damage.