I got some suggestions for you...
I saw the Corsair Dreadnought, and I couldn't fail to notice that it haves similarities with the empire battlecruiser from StarWars.
I would suggest that you should insert new ships in the game from Stargate Universe, like some Asgard capital ships, or Human Battleships. It would be great if I could find there an Ori battleship to buy, and to fight with it against some Wraith ships.
I would also suggest that the battleships should have more weapons, greater range (at least 3k) and the damage inflicted by a capital ship turret to destroy a fighter from max. 2 shots. I had a Liberty Dreadnought, and 10 Wrath killed me. It is not normal that a capital ship to be so weak, and it's weapons to drain so much energy. I would also suggest that a battleship to cost at least 1.2 mld. credits, cruisers at least 750 mil. frigates\destroyers around 500 mil. and gunboats from 250 mil.