ankha_sword: If we're going with the mp closed then:

-enable deconstruct
-keep dungeon open (only if Dmg for pvp will be 5x or greater)
-Make it so ancient pots will be more common either on low lands or during a period of days
-just a slight increase in pieces on lands around lvl 30 to 50
-decrease elixir drop rate as the game progress

And if the mp is open:

-make gear drop from losing and death like a true hardcore pvp
-close dungeon
-Keep the droprate intact for the most part

And now, for the so called #100 round:

-Make it so that only 50 people get rewards like it did at one point
-make old bosses from the distant past appear as random spawns on random maps, with stats similar to the higher tier mobs, and make it so they only drop jewels, runes, elixirs, and a very faint charm drop. (They don't give much exp or none at all)
-Make death angel class titled scrolls (why not? And even make diablo too, even if they're useless)
-Open aurora and antagarich just because
-make it so whenever someone dies, they lose exp regardless of the cause (so sorry for that 1% of exp needed for lvl up)
-fix/remove bless
-give spells as rewards (not me wanting dragon strength)
-and make it so the bosses and dragons can move between lands (i hate crowded spaces)

Or just make generic round with 100x pvp DMG but limit the conflicts to a single turn, let's see who's got the quickest draw on the west

All in all, make it something worth the pain of grinding and evading pk bots

-tsukuyomi-: enabled mp.. 1:2 credit transfer.. exclusive reward for top 3 of each class.. exclusive reward for top 100 players.. disabled dungeon in gpvp.. event quest prize 1000sp.. 3 bosses at once with different MS top 5 damage dealers get ms.. 2x rate to get pcs, rec, rune.. deconstruct enabled.. 10sp daily quest.. 5000 wins every day is quite a lot with 2x the rate

uoti: Never fix or do anything to the current Vault. Older players like to hoard special items by this method.
Hoarding is a problem alot of older players cannot accept this. It is ABUSE of the game to hoard rewards to send to overpower their main from multiple rewards.
Vault is fine for 1 account. What i want to see for 100 PvP is:
1. Level lock than suppress EXP
2. Gold cap or MAX lock than suppress gold.
3. Wild Monsters must decrease the DEX because where do they train without beastmaster for them to be that strong.
4. Monsters must miss regularly .. players never miss
5. Crafted Recipes and Pieces. It xmas after all

bloodkicker: Make a requirement for doing feedbacks. Like a level requirement. Maybe 150. Almost everyone's main are at 150 and up(Leveling to that level is easy as 1,2 & 3.
This is to minimize those cowardly players from doing feedback using alts.
Add a react button on feedbacks as well

tsh: Agree to bloodkicker 👏

-top_global-: Sir pls make legendary for assassin like dual gun 😁😁.with this many will change to assassin class boost and weapon..