One thing that I didnt like in WC... theres a raging war going on... yet you never take part in ANY massive endor style fleet battles... you just go mission to mission... one cap ship here and there... COME ON!!! I specialize in knocking out large capital ships, I love it in the big fleet battles, I take a light bomber in, knock out the command ship, sending the enemy fleet into disary (not as easy as it sounds), the go back to my ship, rearm, and take out any carriers or battleships (depending on the game), basically by the time I'm done the enemy fleet is little more then a vast array of cruisers, destroyers and smaller ships... heh! The only issue is, THEY DO NOT HAVE NE OF THE IN THE WC series!
To go back to the original threat question, a standard fighter may or maynot be able to take a capital ship down on their own no matter what they say, not including to what Maniac Marshall says about how he took a capital show on his own. Certain fighters were design with a specific function.
In relation to Starlancer. I think the fighter roles were a bit wierd yet it was good how they set the guidelines out as you would have the fighters take out the ships defences and let their command ship or the bomber wing to launch their torpedos.
Personally they should have design a heavy fighter/bomber ship which they did not have. Sure the bombers in Starlancer had a standard gun system but it did not have a high success rate of surviving a gun fight with another fighter, it definitely need a upgrade....