Too anyone who has purchased and is a vet of the original... Can you still use the Dev Squad exploit? Curious if this "feature" was fixed or if they left it in as is.

What was the exploit? And if it was never patched in originally I doubt GOG has done anything about it.

I think he means using the item exchange option to have another group of Marines take your heavy weapons, reload them and trade them back to the original soldier.

Actually, that would be quite nice. I always felt bad for the 3 guys forced to use a bolter later on.
I will test it as soon as I finish mission 2 again.

It still works, but only for Devastator squads:
You need to have the last slot empty, then, when you drop someone there, it will automatically equip the marine with a heavy bolter (without checking the heavy weapon count of the squad).
You can then swap him with a bolter Marine of the Dev Squad, and change for another heavy weapon.
Drop the marine at the end to an empty slot, then put another marine back in, and voila.
You got another heavy weapon.