1) Remove the level blocks
2) Add active moderators
That's basically it to start with. With just even one active moderator, I believe there'd be an enormous dent in all of the hackers and autoers. And of course, the level blocks need to go. There is no reason for them to be there. The way I see it, yeah, you should be a certain level to go to specific places, but why can't you just experience that for yourself rather than just not being able to go to that place at all? The game worked out fine before the introduction of the level blocks, why are they here? Just be done with them and let us roam around the EO world like we used to.
Other than that, the game would just need more players to get its economy going. You might argue "too many players is annoying because every single place you go to is packed and taken", which I somewhat agree with, but at the same time, I think too many is better than too little.
But, will these two simple things ever be done? ...Probably not. Just thought I'd throw my two cents in.
-Cru