I would prefer if there wasn't an option to change adavcne classes. You made a choice, and you have to stick with it. Or else if it were allowed, everyone would take the "flavor of the week". Example: If Mercenarie would become the OP AC, then all/most Powertechs would switch to mercenarie, just because it is the flavour of the week/patch. Kinda like in WoW within the 1 class where Unholy DK was great during WotLK, but then Frost became OP, the flavor of the expansion/patch. Everyone went Frost then. Sure WoW doesn't have AC, but it is kinda the same principle. I just don't want people to switch AC just because it isn't the flavour of the week/patch.