It seems that Disney has tried to put characters into the countries that they belong like Mulan in China, Snow White in Germany, which helps with the combining of the old Epcot and the new Epcot. My daughter enjoyed talking to Mulan while waiting for the movie in China to start . To me this doesn't distract from that Country.However, there was just as large a group of guests that went to Disney for the Disney. So, seeing characters and the "familiar" of Disney is the point. My only point is that it is a departure from what Epcot was, and it may eventually turn off many guests that are regulars just as it draws in others. It is a change, and that carries all the benefits and risks of that.
I'd be interested in knowing how much input each country has when it comes to something like adding characters. Did Mexico have any input in this change.