instead of editing the turrets why didnt they come up with a new structure and make turrets s2
i had a few ideas
this one i got from staring at a fish tank, some sort of contraption you place on the ceiling with three "guns" that release energy spurts sort of like the lucifer cannon but slower and maybe half or a quarter of the damage?
From staring at ACTS and seeing how people like the tesla coils
if you look in this image

sorry i couldnt find a better one. but theres an energy gate infront of that ramp
you could have two tall poles (tall enough they dont fit in the side indents which leaves them exposed for the aliens to still be able to attack) that can be placed inside the base or outside the center door that have plasma or energy or whatever inbetween them.
just to make it fair and semi realistic when humans get near like the doors it shuts off and after a brief time delay (maybe enough for a oretch to get through) it reactivates
i cant think of two much from that unless you wanted to have a map with a like... teleporter so that the bases are seperate from the arena
which leaves you to either destroy the teleporters to trap them in the base or since the humans are more mobile in 1.2 to make them move their base elsewhere. but i have a feeling most of the people who have been playing a while will just build new teleporters and put turrets near them