I mean, those were the obvious signs. If Awakening was the best-selling FE, they were bound to put in gameplay modifications that allowed more idiots to play it. I am counting myself as one of those idiots, as Awakening was the first FE game I have ever beaten, but that doesn't mean I haven't respected and played previous entries.
But straight up referencing "beloved" characters just because of their success in the previous title (the DLC of Awakening at least pulled from across the mythos, these characters are just straight up reincarnations from the LAST GAME)? That's just lazy and stupid. The worse aspect is that this game is selling even better than Awakening which means that game as a "reboot" to the series, including conventions and stupid characters, is a good idea of how future Fire Emblem titles will play out.