I am really enjoying this game but a few things could be useful for multiplayer
- Friendly Fire is removed
- All players invited to a realm can play the realm - You could let them still join but only go around the town (use an option to turn on/off)
- When a player loots, it shows somewhere what they looted and can be viewed by clicking on it.
- Make loot lootable for everybody or if you want to stick to current maybe have a nominate loot option for weapons, armour etc
Hopefully you would be able to implement some of this.