I've been aking myself now for a while when fellow pandaren studends mite return, especially after how they departed, and you can clearly see that Ji has a crush on Aysa.
However after the whole fiasco with Shen-zin Su rescue, where Aysa told him off, and than when choosing sides, when Master asked him weather he would join the Horde he was like "Yes... I think that's for the best.", made it sound as if he's decided to join the Horde rather because he felt dishearted and couldn't face Aysa again.
Now, I expected the whole thing to start moving in 5.1, since Allaince and Horde finally made a move on Pandaria, I had expected they would've finally joined them as well, but sadly they didn't. And I really thought they were, considering on the the 3 prophecies of the Emperor Shaohao showed pandaren fighting amongst themselves.
Or did Blizzard just make them plot devices for Wandering Isle and than just left them for clas trainers in capital city without any further plot development, which would be rather dissapointing. =(