See my review here:
https://www.backloggd.com/u/DaelinZeppeli/review/730408

Great exapnsion but one of the poorest collector's ed.
No more trading cards, and it also lost the exclusivity in this items whoever can buy in Blizzard store:
- An exclusive in-game mount: [Imperial Quilen].
- An exclusive in-game pet: [Lucky Quilen Cub].