There are just going to be problem if you try to convert X-wing to Armada. X-wing is a dog fighting game, so every ship needs to be able to dog fight, if in their own way. But Armada is much more strategic, not all ships need to be good at dog fighting anymore (fighters killing fighters) TIE Bombers and B-Wings are both examples of ships that are not nearly as good at dog fighting in Armada as they are in X-Wing, but they are really great at attacking ships. There just aren't many "ships" (I mean the Armada definition here) in X-wing. So instead of sucking it up in a dog fight, the B-Wing is actually pretty dang awesome.
I just don't see this as a problem for Armada. If anything forcing all ships to be effective (at least for their cost) dog fighters is a place where X-wing is a little less realistic. (I use the real in realistic in the loosest possible way since Star Wars itself if neither real, nor realistic.)