I think the current endgame content is farming the ex primal mounts.

Then we have the hunt, there is a new mount as well for killing 1000 S ranks in the new areas, these two fates with mount, minions and frog suit. New GNB tank mounts. Then grinding out the fate ranks in the new areas, leveling up the trust maybe? Leveling everything to 80 for the Amaro mount...

Well, we are moving away from true endgame content.

What about solo runs in the Deep Dungeons for that sweet Necromancer and Lone Hero titles?

But yeah, you have to set your own goals in this game, otherwise endgame is just expert roulette once a day and 4 raidturns + ex primal.