So idk what they plan on doing to keep eureka relevant later down the line or keep Anemos alive when the next zone is released, but my way too soon ideas for that are two simple things.

Obviously increase exp to catch people up, but adding iconic FF11 trusts would be the coolest thing ever. Although I don't agree this content is soloable (like ff11 was for the most part) it eventually will need to be and trusts are the perfect way to help people behind catch up.