Biggs forces your target. you have to shoot him in favour of a better or easier target.(typically better)
in MMO terms he is the tank that gets all the aggro.
He was nerfed a little for epic.
Yeah, but he's just in an X Wing. That's not a lot of tanking ability. I can see it being useful if you want to pull some heat off a damaged or valuable ship, but surely it's very difficult to keep Biggs alive long enough to be useful when every enemy ship HAS to shoot at him?
You have to pair Biggs with other glass cannons, and then keep Biggs in the back so that you have a better attack range profile than your opponent. Paul Heaver has a couple of great articles on it, that I believe are in the pinned index thread.