Just an idea… but i would say link each EL and Siptah server together as in a 1-1 ratio, allow full transfers with loot back and fourth between the two, and allow outaide transfers but only naked and with recipes…
I feel this would resolve alot of the issues i see complained about and still allow people to transfer when they feel it is necessary.
EDIT: This would also allow users to play both maps as they please and get any map exclusives that exist/come up in the future