I would recommend including pets garnered from achievements as some of them are easy to do. Mr. Bigglesworth as an example, especially since he can solo one of the 4 Celestials.

Yep, I am still having that bug as well. Super annoying when you don't notice it till after you are half way across the continent. As far as Lucky Yi goes. I have found that my P/P Zandalari Anklerender can solo him and I use 3 crows for Dos Ryga. Well, Crow, Raven and Dread Hatchling.

I'd say hold on to them for WoD. I was looking at another site that "datamined" epic pet battle stones, I have to think that there will be a way of trading up into them. At least I would hope so.

I have also noticed the difference in drop rates. Went from around 6 in 10 to more like 2 in 10. However. The difference may just be that I have moved from random critter catching battles to pretty much only doing the daily tamer battles.

I just scrolled down the list of servers at login for one that was low population and RP PVP as that seemed like the lowest possible population. Made a DK and farmed the Minfernal for a week before i caught one. After that I moved up to farming the Proto Drake then up to farm the Scourged Whelpling ...

I am embarrassed to say I still have yet to find a Skunky Alemental.

Cyclone 35% to hit my AZZ! The Pandaren Spirit Daily has that thing hit my team at 70% minimum. Been doing the daily for 2 months and it is the only one that I have noticed completely out of whack.

There is a guaranteed Burden in a chest up where Ordos is but in small courtyard to the left. To get it requires either the Legendary cloak to jump the gap in the destroyed bridge or to purchase a stack of Gliders from the vendor for 1000 Timeless Coins and glide from the bridge off to the left side...

Annun, that is a beautiful Albino Snake. I think he wants to join the front ranks of your battle pets.

You forgot to mention in your boss fight mechanics that they are immune to diseases. DKs need to bring a friend.