They're utterly worthless against Vuldrok at the moment, FWIW. And really, they aren't all that useful unless you're facing a massive carrier swarm fleet, in which case there are likely to be so many more enemy craft that they can sometimes outnumber you enough to win a dogfight even with a +1 versus -2 modifier. Initiative becomes extremely important in that kind of matchup.
Against small numbers of bombers, fighters will kill them quick, but then they're pretty much done for the fight. Most times, I'd rather smash a small bomber force with shipboard guns instead and use the points I didn't spend on fighters and a carrier for more guns and troop/psychic upgrades instead.
OTOH, the cheaper suicide fighters, the new gunboats, and Hazat boarding shuttles are scary enough that they make dogfighters more attractive, so the environment is in flux.