I have an Background Story solution for possible “Transfer between the Worlds” Option
- Invent a kindly Soul caring Goddess (Must be female. They care stronger)
- If you use her Service only your Soul (Connection to the Server) is carried to the other World
- No Armors, no Attributes and Skills can be transferred
- If you jump for the first time into the other world without Avatar, the Game starts from Character creation point
- the Believers or High Priest of this Goddess are the Trigger NPC for that, they also summon your old World Body from Nirvana back into their World for give the Soul the old Vessel back. The Soul recognize the old Body and remembers the Skills and Talents
- You can also let the Player wear some special Holy ceremonial Cloths for that so that the Player need to Store beforehand all his Pieces in the Inventory and Body. But all should be in the Server Files
- Perhaps to start the Ceremonial the player need to “wash away all things that hold him back!” put all things into a special Temple Chest.
Perhaps Mitra’s Sister or something could do this trick. But do not connect this Services to the Goddess the player selected. it should be available for all of them. Thats because inventing a new Goddess is needed here for the Story to fit
But then, is this Service really a kind thing? or is this just prolong the endless cycle of this Exile World 
and if some new DLC is out, the Player is granted to allow to move into this World
Thats for the Story Lore master , also you could sell this as a side effect of the Dark Tower