It's been like that for a while (like "anti-idols"). Japanese media is always unpolished and cheesy anyway, which is one reason anime is the only part anyone outside the country cares about, but the music industry does have a surprising amount of room for letting artists do whatever they want as long as it works.

When I heard about Atarashii Gakkou I thought it was some kind of American fan group because the name sounds like it was Google translated… guess it's just unpolished too.