This is less to do with pandaria Pandaren and more some with Wandering Isle Pandaren.
But seeing how the Tushui and Huojin seem to come together during Legion only again to be torn apart by war in BFA once more it might be an ideal time to give Ji and Aya some screen time. A plotline MoP dropped as soon as the Pandas left their island.
I wonder what people's feeling where about given the Pandaren some story?
Also I guess pandaria Pandaren could appear in quests where the Horde and Allaince try to get then onside in the Great War. Give Lorewalker Cho a chance to tell us about the past and have Taran Zhu call us names like the good old days.
Edit: Changed lore for story, since people have correctly pointed out I incorrectly used the two interchangeably