I comfess that Heavy Rotation is a boring song but I also comfess that the song turns so damn awesome when performed live regardless of the members performing it. Heck, I don't think that other songs—when performed live—could match Heavy Rotation's quality as a live-performed song. Every time I watch a 48 group concert that includes the song, I always repeat it lol.
I comfess that I dislike Mayuyu's mouth movement when she sings. I always find it exaggerating.