Give a quest where once you have an Emp. or Woe weapon, you can unlock the Weaponskills for all weapons. Some of these weaponskills define the job, without them you might as well sit on the sidelines. With those weaponskills unlocked, you are stuck with the one weapon, so if you introduce more in the expansion, they will go to waste.

Seriously do something about WOE weapons, they are impossible now, either made some fluxs instanced and soloable-trioable so that people have a chance to upgrade even when WOE becomes popular again. This is I believe the fourth time it has died.
Stick to a smaller party setup for content. Most of us been grew up in the game and we just don't have time for 18 man content. many have left because of this, and if you go back to this setup, you will lose many more.

And the big thing, which I mentioned in a previous post. Think before you act. Look at the repercussions of your actions, you don't do that now, and never have. Geodes in recipes is a prime example. Take the blinders off.