One of the best aspects of the Legends canon was Ardus Kaine and the Pentastar Alignment and it would be great to see them in some form within Armada. What about introducing the Enforcer-class picket cruiser for Empire together with Ardus Kaine and the Pentastar Alignment?

http://starwars.wikia.com/wiki/Enforcer-class_picket_cruiser
The Enforcer-class picket cruiser was a starship built in a joint venture between Sienar and Kuat exclusively for the Pentastar Alignment, a splinter remnant of the Galactic Empire formed after the Battle of Endor. The Enforcer was 600 meters in length and built on the frame of an Interdictor-class heavy cruiser with the gravity wells removed and the power generators moved to their place. The generator positions and re-arrangement of the ship's power grid significantly enhanced its weapons, shields, tractor beams and engines, making it a remarkable ship for its size. The ship also had the Pentastar Alignment logo emblemized on the sides of its command tower.
Though the only known visual depiction of the ship can be found in Star Wars Adventure Journal 3, based on the ship's description it shouldn't be hard to produce a physical depiction of it for Armada.
It's possible having Ardus and any Pentastar related upgrades could give Empire ships an advantage in battle.