Stricter enforcement of forum rules with a focus on coaching the forums gate keepers to change their behavior.
Remove any and all political social commentary since it is all from the far side of one side of the political spectrum.
Focus on telling a compelling and enjoyable story with out the above. It's a game not a biting social commentary.
Make all content solo able /group able and bring the game back to the original definition of MMO. (Massive in reference to the size of the game. Multiplayer in reference to the fact that you will see folks from all around the world and can work with them or not. Both should be viable and get the same rewards for time and effort. Your preferred way should not be forced on everyone. Online in reference to the fact you had to have internet to play the game.)
All rewards available in all content, play as you choose. Want to be a Sociopathy (your character is killing other peoples characters so it fits) and PvP, go for it. Want to group up with fellow Sociopaths and WvW go for it. Want to do your own thing with out having to deal with Sociopaths, Elitists, and Gatekeepers, go for it.
Make the mechanics of the game more intuitive and less need of wiki search, or out of game research for what to do.
Get rid of BIS mechanics and best build mechanics.
Better costumes with out all the graphic issues. They should look good on all the races not just a few.
If folks want to be Furies, let them. If folks want to dress like a tramp, let them. If folks want to dress conservatively, let them.
More interactions with the Dev Team in game. Events, hide and seek ect.
Cirran
I know none of this is going to happen, BUT you did ask what I would do.