
well lets share this with you:
EXP Icon:
Like others effect in game have icon (poison potion betsanc magic etc)
It can be cool to have an icon for Double EXP and Double % Loot.
Its possible to make an 1.5% too

In real life 2 shop can sell and buy same things but with different price. I think it can be more logic to sell at higher price water to an Tulim Npc than an Hurns Npc. Then i think its better to have a differents price for the same items at 2 diferents places.
example: Water can be buy under |100:300] and selll to NPC under |10:200] then you can make profits but its low and you need to move over country.
Tattoo:
In game you can meet a Tattoo artist and If you had realize an exploit he can made a tattoo on you who change your skin style. This points can perform the customization of your character. Player of the month:
All players can vote during the month for the player of the month. At the end of the month the Winner get a special Crown (This item its attatch to the player and auto destroy after 30 days). and a Golden name. if have equality both get rewards. Player can get reward twice in a row.