Job-exclusive emotes :T
...what, I'm not joking. We can unlock jobs all we want, so "our mains" wouldn't be missing out, and it'd even give roleplayers something cooler to use.
Think of MCHs with a water gun. ASTs doing fortune telling. Dragoons pole dancing. Dancers doing the dancing minigame from KHBBS (they already have button inputs in their skills anyway). Arcanist jobs interacting with their pets...