G.A. FO here (Ryan Korr), whenever Erebos sees and responds to my last message confirming we are good to go I will be putting up the invasion.
In answer to the question about ground objectives, there are no ground objectives. However, half the star wars battles we see in the movies are fought where? On ships or space stations. In this case, the invasion will focus on ship to ship boarding. There've been so many purely ground invasions, or space battles with no boarding, that it will hopefully provide a unique and fun change of pace.
"Ground" fighters will find themselves fighting in hangars, ship corridors, and other areas throughout each ship.
Additionally, I've seen that a few people were concerned that somehow having this all based in space gives the G.A. an unfair advantage. I'm not sure why this is seen as such when the G.A. have no dedicated "fleeters" that I know of.
And lastly, since the rules change there shouldn't be any perception of advantages or weaknesses, since those numbers games don't matter anymore. It's all about the stories you tell, how they tie in with the overall tone of the invasion, and being good sports.
See you all out on the battleground. If you have any questions shoot a PM to the Ryan Korr account.