I'd like to bring my thoughts to this disscussion:
Server-Wipe:
pro:
- all start equal at level 1
- may attract some new players
con:
- old players will be punished and might quit
- will frustrate all players as there will be no mats for crafting at the beginning
- will nor fix the economy on the long run
- even new player will perhaps quit if they hear that the server was wiped
my suggestions:
- Fix the manor-system ... perhaps with a guide for castle owners 
- Reduce the XP-Boost for lower levels. If this is to dificult adjust the droprates for mob lvl 1-20 for more full drops.
- Reduce the Premium-boost. Give Premium-players some other benefits (more Crystals it enchant fails?) Premium-shop for SOE-town-scrolls)
- to regulate the economy make a GM-shop for all basic materials to cap the price (5 times base price would be ok)
upgrade to C5?
I don't mind keeping C3. The only thing I'm missing is the enhanced map.
But I definitely encourage a reroll to the prior state. All new character made during this PvP-Event and all Items should be deleted.