I've always had problems with the Rebellion interface. That is what I think turns off most people. More 3D with less "windows" to open would be ideal. I never liked the "jump anywhere to anywhere" system either. It doesn't give a sense of territory, plus people can just leave their ships in hyperspace for months ... not realistic. Obviously the Rebels had the advantage of "surprise attacks" but I think you can incorporate that into other avenues of the game system. I would almost say, make Sins of a Solar Empire into Rebellion 2. It has a great interface and works pretty well... my only concern is it lacks true units other than spaceships... no characters, no special forces, no troops, etc.