It might not be content for you , but it is for others , personally it is the only end game content I find enjoyable at the moment , I like grinding and I love how they made fates enjoyable and each one of the high level fates feel unique

on the other hand I don't do savage or extreme trials anymore since most of them require a static to be able to clear them

I have yet to join a Eureka instance which isn't full , I think many people are enjoying it as well