I decided to give this song another chance and as I was watching the PV I came across some very sloppy dancing.
First of all, this girl, whoever it is, does the entire routine in a mirrored way. I thought it might have been on purpose since she's near the back and sometimes they have different parts, but she's the only one doing the dance completely the opposite of the other girls. I think she practiced it off a video or something and forgot to mirror the moves. Actually, the legs are correct but the arms aren't. Some caps:


A little bit later there is one girl who completely misses the cue for the knee lift:

She's not even the only one, there is a massive difference between timing and height of the lift throughout the line-up.
I don't expect or want K-pop levels of tight dancing. It's part of the charm that they're not completely in sync because it gives off an open and playful vibe. However, I think this dance has some major screw-ups that should have been avoided.