rebels were less powerful because of their limited number and lack of technology. But with the Mon Calamari cruisers and other allies, they are indeed powerful, and a whorty opponent for the empire. Yet, no nebulon B frigate can still stand a VSD, the only ships capable of annoying to the degree of insanity the Imps are the Mon Calamari, the Y-wing and the X-wing. otherwise, I think that units are well balanced, and they provide a challenge for both sides. And I don't think it's true that only bigger number wins, managing all your units is important, as are tactics... lure the enemy away then blast his base, for example, a surprise attack works in leaving you more vulnerable, because maybe you left your most powerful hero away,and the enemy reeks havoc on your base...