0.) Right click blacklist, sorry this is so easy, it doesn't deserve a spot.
1.) Party size increased to 5. I play tanks and healers, but 2 dps expects too high of a tanking and healing population that's never been represented in any mmo I've ever played.
2.) Buff exp from leveling dungeons, buff rewards from capped dungeons
3.) Add more dungeons.
4.) Make Leves more rewarding.
5.) Take abilities off the GCD that shouldn't be on it and simultaneously get rid of the animation lock.