Please don't consider this me trying to convince you. I can't. Nor can you convince me. It is not possible to derive matters of taste with the help of logical arguments. However, what we can do is elaborate. I want to try to be a bit more objective in this post and try to explain many peoples' reactions to readers who are interested in understanding it.
David wondered in his latest comment how I can find Pandas more silly than cowmen. There's a simple reason: Kung Fu Panda. If that movie and all the merchandise around it didn't exist, I might not be exactly thrilled by Pandas, but it would be much less of a problem.
Note: I think that movie is funny. It's just not compatible with WoW.
Now, if Blizzard desperately wanted to add Pandas, irrespective of the current hype around them, they should have tried to make their Pandas as different as they can possibly be from Kung Fu Panda. Watching Blizzard's cinematic, however, reveals that they did not only not try, but actually tried to make their Pandas similar to Kung Fu Panda!
The racial is about cooking - watch that Kung Fu Panda trailer above! It would have been possible to show us all kinds of Panda classes. Panda Mages, Panda Hunters, Panda Shamans, .. .But those in the cinematic exclusively focus on Monks - martial arts - Kung Fu. And they didn't even try to evade memorable pictures from the movie. I didn't find a screenshot that is more zoomed in, but have a look at that screenshot from the "Kung Fu Panda 2: The Kaboom of Doom" trailer.
This is exactly the pose that the WoW Panda does in Blizzard's Cinematic.
I was remembered about that movie instantly!
There are no silly, popular movies about cows as far as I know. Moreover, "cows" is the wrong term to begin with. "Bull" is the right one. A mix of bull and man is deeply rooted in western lore and Minotaurs are quite common in all western fantasy settings. Minotaurs are in no way silly, let alone cute.
I am not opposed to using animals as sterotypes for a race in a fantasy game. This has a very long tradition in all cultures. Fables are usually not silly at all!
But Blizzard not only didn't try to avoid any comparions with Kung Fu Panda, they provoked them! And in doing so they played into a fear that many WoW players did have for a very long time: "They aren't catering to us anymore. They cater to a childish crowd that is even more casual than me".
This was a terrible mistake.