Oh, I've heard how bad it gets; If a female villager sings Welcome Horizons (and certain other songs), for some reason, they sing it one octave too high, producing pretty painful notes at times. I think they sound fine on certain other songs, like K.K. Rockabilly and (weird portamento glitch or whatever aside,) Bubblegum K.K., but yeah, I'm kinda with you on this. To me, it's weird how synthesized the singing sounds. I'm used to it with K.K. (sorta) but not completely with the girl villagers.
Here's how bad Welcome Horizons sounds (not the song itself, which sounds good even if the game overplays its melody
everywhere):
While we're talking about villagers singing, does anyone else find the song they sing when no music is playing a bit...weird? The way it sounds when a girl randomly starts singing it...it's hard to describe, but I think it somehow creeps me out a bit. Part of it's probably the way their singing sounds, and the other reason's because it can come out of nowhere, weird-sounding synthy notes with no backing...