I have some nicely thought ideas which could improve the interests of the players.
1st. An oldschool farm zone, I thought about (Forgotten Temple) this zone is just great and it hasn`t been used in any server so far, so you can consider it as unique, or you choose EF, which is overused in Mid rates but still a funny spot.
2nd. Auto events, with nicely improved rewards( every 2 hours or so)
- PvP events as well, which an event GM will hold, let`s say twice a week with some super nice rewards, pvp events like 4v4, 5v5... or just every Saturday at 20.00 GMT+1 or +2(wheter you want), this would make the community happy and would bring the people to pvp for something.Make groups try to play as a team and such crap.
3rd idea.Vote system, don`t know if you have it or already planned it but this would make the people vote for the server and for their efforts they took for voting you give them rewards, such as GB`s, LS`s, also this could be every 20 votes?
4th, last but not least I`d suggest you to remove the auto noblessing shit and put the Cardine letter into the shop for 2 gb`s or so( depens on your farm system), but don`t put the letter with full done quest, take the Barakiel part out, so people would go to Barakiel and they`d have to kill it to get nobl, and you could make that zone Chaotic, which means killing w/o getting karma.So you`d have some pew pew`s there too.(Respawn every 2-3 hours)
If you`d consider this seriously then you wouldn`t fail in any way, that`s just succes dude, believe me, I`ve been trough this game for almost 6 years and I know what I`m talking about.