It truly matters when overcomes what is supposed to be in essence: a strategic game (with some little RPG touch most times).
And for all what a gamer's sake can expect from Fire emblem is to be good enough about that. The rest is more or less as a filler, but sitll important enough to bring any short of progress for the series' sake and evolution (deeper story and more character development value, my castle mode, improved multiplayer with online mode [HALLELUJAH], crafting system, recruiting system (with a couple of good 'reasons' *wink wink Orochi*), improved streetpass and few etcs.).
What I am saying is, despite of the more shameless incest is shown here comparing with Awakening, is not that terrible. Of course it goes two steps forward, but at least there isn't, say, pure purely nudism at all. There are worst games about that.
... What most bothers me are some 'suggestive' lines some characters mutter when you rub them (in the face?)