I'm not really sure that WoW needs any new classes. We've got a ton as it stands right now and each of them has 3 possible play styles. Now, that's just my opinion, but I'm sure I'm not really alone in it. Rather than making MORE CLASSES or MORE RACES, maybe we should just give each current race an extra class option.
I am NOT endorsing giving every race, every class, and pushing ultimate homgenization, cause that would make the game downright boring. I am suggesting a small scale similar to Cata in bringing ONE previously unplayable class into each race and still keeping it real. Like a gnome hunter (cause goblins can hunt) with a mechanical pet, or Orc druids (since they've been living and learning from trolls), or something along these lines.
I'm just tired of seeing the "new hero class" ideas popping up all over. We don't need more classes that start at 55 and suck the fun out of the game for 5 months while everyone and their mother levels one. Bad enough we got stuck with Pandas. They could have just introduced the Monk class and left the playable race out of the equation. Just my 2 cents.