That's an awful lot of butthurt over adding FE characters to Smash for long time fans. I would think fans would be happy for the series to receive the attention it deserves (imo, but ymmv). Personally, I was thrilled to see the Famicom Wars AT, because that meant there was a chance that people would become interested in the Advance Wars series again. I'd rather games I love get representation in Smash than not. It shows me that they are still relevant, but that's just me. I suppose you'd be equally incensed if they added Sigurd, Nephenee, or Tana? Don't say it's because they aren't all sword users: they would be the same class of fighter. Were you upset by the Black Knight Mii outfit? I don't recall seeing the same level of outrage over that, either. I also don't recall hearing this much anti-FE rage until after Corrin was announced. Coincidentally, that was right about the same time the fans learned their favored character didn't make the cut. The plot thickens...
You also keep saying there are too many sword users in Smash. I'm afraid that argument doesn't hold water for two reasons. First, the number of sword users is dramatically less than both "shooter" and "brawler" character types. Second, Smash is a collection of different Nintendo series and characters from those series. I'm not sure if you're aware of this, but swords are a pretty big deal in Japan (and most of the world) and a lot of games use them as a hero's trademark. If we put an arbitrary limit on the number of sword users in a game that features a collection of Nintendo's stars, a lot of potentially deserving games and characters are going to get screwed. There is no such thing as "too many sword users" in Smash, because the roster reflects popular franchises. I would rather they leave the "sword limit" open and add characters they think deserve a slot than introduce some kind of quota system where they have to maintain a certain ratio of shooter/brawler/sword characters.
Really, the whole too many swords complaint smacks of either "doesn't like Fire Emblem" or "Unpleasable Fan." To quote
this Reddit thread:
Thus, the percentage of sword users has remained proportionally consistent throughout the series. Now then, can we get off this "too many swords" horse? It's been ridden into the ground.