New in game events.
Give some love to power sets/AT's that are falling behind.
(Making MM attacks more viable and make pet stay command stop them from chasing enemies but still use ranged attacks, give controllers their pets early so they can solo better, get rid of random Quant spawns for WS/PB, etc.)
More content (Illusion Dominator, Melee Mastermind, Melee support class, create your own sidekick, etc.)
Graphical overhaul on costume pieces and environment.
The that has already been done is great, keep up the good work!