This ougt to answer a few questions
Aeria, like ijji, is a game portal/host. So the game content in AVA will most likely stay the same, as per developers wishes.
I do think that there will be a better solution I all of the greavances that the AVA players have. Aeria actually looks at what players say on the forums.
Being a member of Aeria for nearly 4 years, I can say that the people are more mature and are filled with constructive criticism (which is a good thing!).
Being a member of ijji for a year and a half, I can say that their community is the opposite.
Nonetheless, I truly feel that ijji members will be immersed into an environment that will act as a positive influence and they can easily be grandfathered into the community without much hassle.