Personal Island
Purchasable with honor or medallions. Maybe customize your traditional Japanese home there.
Ascended Crystals
Converting 10 crystals to 1 by going to a designated spiritual NPC to preform the task. Each ascended Crystal boosts an individual stat by 1 point depending on the trait of that Crystal to a limit. (May solve stackable crystals that have been requested)
Ex: 1 ascended Defense Crystal will increase your defense stat by 1 pt until death.
Sepukku
Can be committed by traveling through a dangerous dungeon/event? Once the overlord(Akuma derived as Satan for Japanese folklore) dies, you can begin the spiritual transition to an “afterlife realm”. Giving you the ability to increase the level cap of blessings to a limit from 20 -> 25 there per class.
Ex: after reaching the “afterlife realm” you can spend 250 honor or specified medallion cost to permanently increase the max crystals of the dragon blessing from 20 -> 21. Each upgrade becomes more expensive (other things also available in the afterlife realm just haven’t thought so far into it). You will also be able to come back to the spirit realm with your equipment & remove blessings you don’t want anymore(if the devs feel that this option is viable).
Subscription Plan
A monthly plan involving exclusive quests, 1 pet, subscriber badge, etc.
Fishing
I mean this is perfect. Imagine all the sushi I’d be able to craft it would feel surreal.
Horses
Iffy about this implementation. Allows you to ride a horse around the map. You can not use abilities, attacks, be in combat, or in dungeons & encounters on the horse. It has its own health which means mobs can still dismount you. If dismounted your horse dies, you can remount in a certain time frame. Horses may also jump over borders but also have a time constant to do so. The more I write about this addition the more I realized I just robbed the idea from Albion, could work though potentially!