Yeah, well, that makes for boring Smash characters for the most part.
JRPGs are far and away my favorite genre...but none of those characters are anywhere near my favorite to play as. On the flips side I abhor the entire genre that spawned Banjo-Kazooie, but I can easily see myself enjoying those characters in this sandbox.
They did a good job of keep the sword characters pretty unique though.
DQ Hero will have spells
Marth and Roy do have similar movesets but are WAY different because of the sweet and sour spots
Chrom and Lucina are echo fighters, but they don't have any sour spots so even they play different as well.
Links all have their zoning game, they're pretty similar but still have distinct things.
Cloud has his limit breaks
Shulk has his Monado arts
Ike is the only true heavy weight Sword guy
I wouldn't classify Meta Knight and Joker as sword characters
The only thing that they gotta get rid of is the overuse of the down-b counters lol