A few suggestions

[szpan]

How about implementing:

-Mail system (you can send them, but you can't read them - you can lose items in this way)
-Mercenaries (it's a really nice addon for players that want to lvl aco or something)
-Renewal interface (only interface, it gives you really good things like more sections in chat, storage, you can organize party easier and a lot new stuff)
-WoE SE - (it's a lot better then FE in my opinion)
-One castle per WoE (there's like 50 players attending WoE and a lot of re-breaks)
-Different Castle for wednesday and sunday WoE (some players have to wake up at like 4am to defend the castle from last WoE that was at 9pm their time.
-Sealed Shrine (it's on almost every server, the headgear looks awesome and it's almost the same as Alice Doll, the MVP is quite challenging)
-Add Brasilis quests (they're really nice - fast, a lot of exp, some of them are even repeatable)
-Add BG 2.0 or at least tierra and flavius (those are 80+, free entrance, some players don't like KVM)
-Change price for BG rewards to the official ones (those from KVM are really OP and to farm those from regular bg atm you have to spend more money then they're worth)
-Remove hitlock from MVP (you can really easy kill almost every MVP with wizard or sniper)
-EP 13.3 (and change NW and Nidhogg to official, seriously what's with perm pneuma under nepenthes or all those aggresive monsters with body relocation in place where you do the quest)
-Multileveling (you have to do some easy quests at like 90 lv if you don't want to lose earned experience)
-Remove GR/Devi/MP/MVP from WoE, maybe BG - it's ok if there's like 1 per 50 players, but here I feel like playing High Rate
-Baby WoE maybe (since there would be less castles in WoE, and some players really enjoy it)
-Repeatable exp quests (some players don't play this server only because of this)
-Some things from renewal (I don't mean like the whole system - cause it really sucks, but things like gravestones from MVPs, mounts, custom Dewata or other updates, 3rd classes sprites - only sprites, not skills and let's say accesible via quest/donation)
-Add v4p for other toplists.

Almost all of those things are already done, you just have to download files from ea or ea forum.