I agree alot of it is media attention, and the difficulty balancing, but we have to consider the genre demographics as well. Japan is big on RPGs, turn based games, and more "in-depth" or "rich" games, when North America is generally a pick-up and put down, coffee break game consumer. That's not to say FE isnt like that, because it pretty much is a very easy game to pick up and put down, FE13 even more so. It's just the genre isn't very well-known for being easy to get in to, or easy to get out of.