But Force Shell on a Cobra can't make a ship fly off because Force Shell on c1 or c2 cannons does next to nothing.
Actually it can do, especially on mediums. Its a lot less effective than on large or huge, but against small ships, you can still knock them about a bit. I do feel like they could do with a little buff, but its not too bad. Against large ships they don't seem to do anything, but there again, I wouldn't expect them to either.