Fuggin trolls. I'm sick of the kung fu panda references. The 'Pandas' have been part of the lore long before either movie came out.
Second, since the family and I all play, I purchased 5 copies of the digital version, and none of the physical. So, I contributed heavily to the 'poor retail performance'. The queue of 1200 players during prime times tells me that I'm not alone.
Finally, the expansion is very well executed. The artwork, engine upgrades and story lines are all phenomenal. Is the game dumbed-down for the masses from the old Molten Core 40 man raids? Sure. Are there a lot of usability enhancements which have been made to keep Blizzard's offering current with competition? Absolutely. Is the game worth playing? My monthly subscription says yes.