So if MoP appeals more to the Chinese than to anyone else, would the American gamers here be extra happy and give Blizzard more money if the next expansion was cowboy-themed and looked exactly like the American southwest and was populated by fat, xenophobic bald eagle people that talked in various tv-stereotype American accents? Did the Gilnean cheesy accents pander to the British? UK visitors, chime in here. Did you give Blizzard more money because they had "British" accents in their game? Do you want to see an entire expansion that looks like England?
"It's like China so Chinese people like it" is just such a simplistic thought pattern. If someone made a video game that was "California themed" or something I probably wouldn't be more interested in it. I'd be less interested in it if anything because people play fantasy games to see new, foreign, and interesting landscapes. I would be pretty uninterested if the next World of Warcraft expansion took place completely in an area that looked like downtown Los Angeles. Do you want to see a fantasy MMO that looks exactly like things around you outside? If not, don't assume everyone else does. When you generalize that only people in x country want to see y, that's borderline racist.