you will get multiple opinions, and everyone will want something diffrent :PP
By myself. I would like to see server, where there are 10 reborns, and exp is like x100. Every reborn gives 100 stats, so its 1k max stats at all, but it would take you some time to get it + every reborn would give you some kind of bonus (cc or dunno what) But it is the fun part. About drops/dungeons, hmmm something like traditional fallen one was good, connecting with nice events at yui, to farm items in dungeons from mobs, which would be tradeable to yui for things like weekly 7 days costumes/wep skins (which would be changed to diffrent one every week) + farming things for belts, etc. And finally some amazing idea for TG, so force people to farm tg as well, whatever they like, or not. So for most things in shops, you would have to use wexp as well, not only alz/or materials, but always some ammount of wexp too