Quote Originally Posted by Rhas View Post
They already commented that players with ARR only will be able to play players that have the new race and jobs. The overall game system of ARR is supposed to be updated for those files at the bare minimum so they can party with everyone.
Playing with other people is a different issue than playing the same account and characters from different platforms. It doesn't answer what happens when you become an Au Ra using the platform you installed Heavensward on, and then try to log in that same character from your other platform that only has ARR on it. Players have speculated in both directions on that issue, but at least as far as I've seen SE doesn't seem to have directly addressed it.