I know there's some logistics reasons for this, but come on! I think I speak for a lot of people when I say that people like David Wise (Donkey Kong Country Series), Grant Kirkhope (Banjo-Kazooie, DK64), Jake Kaufman (Ducktales Remastered, Shovel Knight), Falk (Sonic Before the Sequel/After The Sequel), Josh Mancell (Crash Bandicoot), Eveline Fischer (DKC Series), Richard Jacques (Sonic R), Christophe Heral (Rayman Origins/Legends)...hell, even Michael Jackson! (Sonic 3)...god, they made many people become gamers and love videogame music, and all of those musicians I listed have such distinct, defined, rich styles that it doesn't feel fair when the game only has Japanese styles (Hell, even some amazing Japanese composers like Jun Senoue and Tomohito Nishiura are missing).
I know it would've been hard for the logistics, but this is SMASH BROS.! They should've gone the extra mile and hired more non-Japanese composers...