So whenever a constructive discussion about Blizzard's motives for MoP/creation of Pandaren as a playable race or the thought that Pandaren are too "soft" for Warcraft, the first thing I always hear as a response is something along the lines of "Pandaren/MoP isn't random/cartoony/soft, they have been in the game since WC3."
How exactly is this a popular response?
WC3 wasn't centered around pandas. Yes Pandas were in WC3 but so what?
The race was originally announced as an Aprils fools joke for WC3. They also had no real lore behind them, they were just one of the many random things put in the game to give it it's flavor.
WC3 Frozen throne also had Sasquatchs, flying sheep and pengiuns roaming some of the maps so you'd probably be ok with them making a bigfoot sighting expansion, flying sheep expansion or a Surf's up expansion?