Addition of Towny- Allows towns to be built. Even entire nations. Would allow newer players to join a group to help them start out and would benefit everyone. More commerce through player owned shops and more fun(could have town events and such). Here is a thread containing ideas about how it should be implemented.
Different Arenas- Addition of a Colosseum(melee weapons)would entice more people to enter. Also maybe more ranged only arenas(bigger ones that need more people before starting). The addition of a mob arena(Its in the works but why not add it here anyway). Different "classes" in the arena's would be a great idea as well(maybe weaker weapons but stronger armour and vice versa).
More In-Game Ranks- A lot of people have been asking for ranks above Legend(which there is only donor ranks atm). Just would make a lot of people happy. Or could re-work ranks to add more in-between(would move everyone to the correct rank for the money they paid to /rank up).
Staff Broadcast- Doesn't really affect the community much but would make it easier for staff to communicate. Would also limit the people I /msg by accident
A PVP/Raid/Factions World-Not sure if possible but I know some people would be interested in this.
More donation items in shop- Not sure what would be best to be added. Just feel after getting Royal myself there's not much point to any of the other stuff( spawn house, claim blocks, etc). Maybe higher ranks(though I'm sure not many would get them), or certain items being donor only(nothing to major, just small fun things), or even a "Donor World" that only those who donated can access. Could have a better "admin" shop or even a build area where donors can build with themselves or far away from everyone else. Could also add access to /feed and /heal commands to donor shop as those can come in handy.
More will be added to this thread as I think of it. This will be where I post all my ideas. Feel free to post your own and discuss the ones already here. Any and all input is greatly appreciated as we care about the community as a whole.