I know that we are getting new beast tribes in Endwalker, which means we're probably going to get new beast tribe quests of them but I would like to suggest something for future expansions: Playable Race Quests.

Like beast tribes, the Playable Race Quests would be repeatable quests players can do daily with stories that delve in depth about the Source's playable races'/clans' histories, cultures, and day-to-day lives. This could be a great way for some of the races/clans that have little-to-no lore or exposure in the game to get some (Keepers of the Moon Miqo'te and Duskwight Elezen, for example).

For trade-in rewards, it could have some of the standard fair, maybe this can be a way for races to get other versions of the Starting and Hempen gear sets and generic hairstyles that are shared between multiple-but-not-all races. Then, for players who are playing the race/clan of that questline could get exclusive items for that race/clan, like hairstyles, face paint, emotes, glamour indicative of the culture, etc (Naturally, if they fantasia to something else, they will still keep said items but can't use them).