A way to add more server (?)

[Krotoan]

Yes a World visit, but on server with no character created in there (and no possibilty to merge one in thoses server), as a temporary server. I think the data in there would be lowered due to no housing/and others data restricted.
It is like a Seasonal server.

Again.. this would be hosted on what hardware or data center? I understand your reasoning, but the equipment to implement it still isn't available even if it's not as robust as the established servers.