The infinite dungeon will be interesting to see in action, from what I’ve read there’s a chance to get a mount from a past expansion. Though it seems so far only mounts that are still available in game.
As someone who plays a lock, I’m thorn on the pet customization changes. On one hand these are long overdue, on the other hand we are losing some of that customization we already had with the excuse being that they want the silhouettes of pets to be easily recognizable. Apparently hunters having a massive amount of different pets is ok, but locks 4 pets + a couple of glyphs to change their appearance is too much for both lock players and players playing against locks in PvP.
Great, especially the new specialization of the Evoker looks promising.