Would be great to have a brand new FFXI server opened that you were not allowed to server swap to/from and had to make a new character on to play on. Everyone would start at level 1, crafting would matter, leveling would matter, server firsts, leveling in groups due to camp scarcity etc. Nobody would have a rema, nobody would have a level 99 alt.
I think this would actually be pretty popular, and it would take no game programming to implement. It's the same game, just that everyone starts fresh.
I think this would be more of a side server people made extra characters on but it would be kind of exciting to see everyone at level 1 and an empty auction house.