I don't think they are changing the class as a whole. I should have clarified, but what I meant was replacing the class name. Maybe something into sword fighters or back to myrmidons. Yes, I do know that the older generation of Korea is more sensitive to the events of Japan, but if you think about it, the older generation will buy the game for their children. For example, my parents wouldn't let me buy some games just because there is too much of a resemblance of japanese culture. Maybe the reception of the newer generation might be good, but the reception of the older generation will be bad especially how they included incest, gay marriage. Also, the difference between Maplestory and Fire emblem is that Fire emblem is a japanese game (yes koreans are that racist). Also, there isn't that much japanese culture in Maplestory; on the other hand, Fates has a whole country that resembles japan. If I was nintendo, I would try to either try to make changes to the game so it can appeal to koreans more or just wait until the next fire emblem game.
Also, fan service is not going be an issue; however, I am not so sure about Camila. I think she is too revealing.