Some stuff that will make the game more interesting.
1) proper pvp system, where players can compete to earn points and trade points for pvp gears.
2) New exp sharing system that will make it more fun to play new builds. Heroic exp being shared for heroic lvs only and epic exp being shared for epic levels only.For example, introducing cash shop item that stores exp in a bag then u can pass that bag to another toon n gain the exp. Different bag size having diff amount of exp cap.
Another thing that makes grinding for epic destiny extremely boring is that you need to play a much weaker epic destiny then what it yours. For example monk playing fate singer is extremely boring. Instead allow players to farm using their main destiny and then xfer the collected exp to other toon using the bag.
3) Start a foundry system.