What’s the point of them? Why not just use a non-heavy?

An opposing squadron with the Intel keyword makes your squadrons Heavy...ATN says those same squadrons still get to disrupt the bomber attacks heading that ship's way...

To continue Cap’s point, it allows you to bring a small bomber investment (6 or so TIE Bombers or Y-wings) and either act as a high-hull meat shield despite Heavy or bomb squadronless fleets.

Things like Decimators, VCX-100's and YT-1300's become very effective at bogging down squads that would otherwise be attacking your ships even with them around.

It has allowed me to survive on full hull well into the 4th or 5th round with just 4 bombers, making it impossible for my flagship to go down before the end of the game. Like jabbawookie said, having to chew through that hull is annoying and forces some unmitigated flak. And if you happen to face a squadless opponent, I've now got 4 bombers. So, you know, that's cool.

Another thing about it. It doesnt say "this ship". It says they are not allowed to attack "a ship". In my first runs with it, I successfully put it on a gozanti, and could cover half my fleet if I flew tight enough. Distance 1-2 plus distance 1 engagement is a LOT of table space. If you get it going right, it really does feel like a net. And I invested less than 50 points to do it. I dont think I'm going to run a non-134 list without it from now on.