Did you ever play Star Wars: Empire at War? Made by Petroglyph, a company started by a number of former Westwood employees after EA shut them down.
Galactic Battlegrounds is nice and all, but it's really just AoE2 with a Star Wars skin. EaW has a decent-looking 3D engine, some nice meta-elements moving your forces between planets, proper space battles, and some great planetside environments complete with weather effects. It's the best Star Wars RTS ever, imho.
https://en.wikipedia.org/wiki/Star_Wars:_Empire_at_War