Lol can't even believe the reaction to this. This is such a huge deal to help with finding tanks/heals.You EARNED that lucky mount? BS, you got lucky, just like I did when got Ashes.
Well, no more tanking or healing for me, then. Just no thanks!
Blizzard has confirmed the "Kael'thas mount" that was referenced is Swift White Hawkstrider.
If you're in a group of friends as a 5 man, in theory couldn't the hybrids all select tank/healing as their role and then continue to dps anyway to get a shot at these rewards? Without RDF this seems a little murky.