To be honest, I think any action of the devs would stir a lot of people's interest, even if just a minor change. I know that a lot of people left the game shortly after things stopped changing. Even a post from a dev on the forums would grab a lot of people's attention, and once word spreads 'round, I think a lot of people would come back, at least to visit. It doesn't matter between the Chest boss, or a King of the Zone version of PVP, or progress in Ulgor or Argon, I think anything would spark this great game and get people back.
I mean, there really is something special about this game. There really aren't any other of its kind out there, even if this game gets shut down, there is so much potential for a newer rendition. The groundwork is already laid out, and I think there would be plenty enough people who are willing to at least chip in to help, or give their thoughts.
Well, I'll quit ranting, but I had to throw in my two cents. Thanks guys.
(By the way I think Fulzar is down again, RIP)