Also it added something else.
Previously I would go out and hunt down mounts when I got bored. During the end of MoP I was running about every raid/dungeon that dropped a mount. Now when I get bored I think about doing that, but realize why bother, can't use em they way the are intended (majority of flying mounts look dumb on the ground), so now I only farm Invincible
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They are there, however personally I have been done with them for sometime now, and there is nothing else coming in 6.1 in regards to new content except treasure hunter missions, and the bounty missions.