I think one of 3 things needs to happen here within the community.
First, like many have said, just boycott Ilum.
This makes sense but will it really get the message across?
Secondly, and I am ware this is a bit drastic but bare with me:
A complete and total community wide boycott of the republic faction.
I know this sounds kind of crazy, but if no one is playing republic, we are in a way breaking the game.
This would show bioware that they have made an unplayable faction.
Lastly, we just do a mass unsub.
I think that is a bit drastic, but if that's the only way to get a message across so be it.
I LOVED this game. I loved the pvp, even with the apparent imperial bias, however after what I've experienced today, I just can't even bother to log in anymore.