The FE representation is really the problem, yeah, not swords guys in general (okay, and three Links is a lot, but I will admit that I was super happy to see YL return). Every single character we have so far is at least in part a swords-wielder, when really, FE has a LOT more to offer. Where are my staff mages? My clerics, priests, priestesses? Where are the archers and knights? What about axe wielders? Spears and lances? That's where my beef is. FE is a great series (even with its flaws), and it deserves better rep. THAT is the problem, not an abundance of 'swordsmen'. After all, we have a lot of brawlers on the roster, and you don't see people complaining... because they're quite varied from each other. That's the source of the problem, variety and proper utilization of move set potential, not 'OMG TOO MANY SWORDIES'. The Smash fandom doesn't handle this well at all.
I will say it's hilarious to see people want more swords-wielders, though, and then turn around and complain that, "Geno can't be unique! We already have both Samuses, ZS, Mii Gunner, Bayonetta, and Mega Man! That's SIX WHOLE GUNNERS, GUYS! Geno is unnecessary!" We can still have more swords-users that are unique with about 15-ish (?) in the roster, so why not Geno when we don't have many gunners at all?