One thing I forgot to mention, a simple but only partial fix for PvP gear inequality, would be to make ALL gear tradable on the broker, like most MMOs. The impact would be immediately felt, and a great improvement to the game.
The gear inequality problem peaked in Aion retail, that's one of the reasons many moved to Aion Classic to get a fresh start on gear, but now so much time has passed in Classic that gear is once again an insurmountable gap for new players/characters.