Things I would like to see added as content:
1. Gambling / Casino for a gold sink. Dice and card games.
2. More gore. We have a setting for language, add one for gore and step it up a bit. The odd beheading or gout of blood never hurt any one.
3. Remove alliance / horde barriers. We should all be able to raid together. Want to be evil or good? Give us reasons and content to play either way. This also would alleviate servers ratios as this is becoming a huge issue.
4. Ever read "Ready Player 1" ? Add this concept in but at a way smaller level. A reason for groups to bind together against other groups to get something really epic.
5. Game conflict in-game is not a bad thing, generate more of that but NOT in a personal way, just in a game mechanic way.