I have a suggestion, though I'm not sure if possible. I don't play many if any MMORPGs so I'm just throwing something out there that I would like to see that would get people playing together. Airship Quests!

I think, if you made Airships come every 30 game minutes, you can link all players waiting for a specific time on a single ship, making a new level if you will. And on certain days for events and such, if people get on an airship at a certain time, they can be attacked by some monster. Remember doom Gaze from Final Fantasy 6? This is what I'm talking about.

Please utilize the franchise, it is only 1 year older than me and I've seen many versions. Classic enemies and bosses are a must, but the way you get there shouldn't be a point A to point B. But I'm only giving ideas, I don't know how it works.