ok i get some of the "i don't want people changing there AC" complaining; but personally i have rolled 8 toons (4 pubs and 4 imps) all different forms of each class (mercenary, vanguard, juggernaut, sentinel). Saying that i have experienced and played them all to just about max level. Recently i was thinking "maybe i should have rolled the same classes on both sides" (powertech, vanguard, juggernaut, guardian) so i would know the classes better on each side. Now i don't see any reason for me to not be able to pay some fee to make this happen, the story is the same no matter which AC you pick, the companions are the same, your ship is the same. Not sure what would be the problem would be... (i get the gear change could be annoying but you could save comms and get decent gear to grind some FPS and catch up, more fun and faster than leveling new toons imo)
So i really hope to see this option in the future...