The biggest change affecting all of the rares in Pandaria (minus the Zadalari Warscouts & Warbringers) is that they will all drop several Lesser Charms of Good Fortune now. I flew around the ptr killing each rare up, and every one dropped several charms. The amount seemed to be about 3-5 from each.
That isn't the only thing being added to their loot tables though, Blood-Soaked Invitations will also have a chance to drop off of the rares in Pandaria (minus the rares on Isle of Thunder). I'm not sure what the drop rate will be on them, but I had to kill about ten rares before I saw one. (Official patch notes)
I think this is a wonderful change. I'll admit, as much as I love pet battling I was getting a bit tired of it in order to get my Lesser Charms. It will also be nice to see people hunting these rares down again given this new incentive. I know I won't be flying by and leaving any of them alive any more when I come across one.
Also, the Big Blossom Excavation totally destroyed Sahn Tidehunter's Little pond in Vale of Eternal Blossoms. The poor guy had to move with his dead crab Carapin to the northern pond next to Mogu'shan Palace. He is shown at his new location in the screenshot below.
|Sahn Tidehunter at his new location in patch 5.3|