Great pics Shirenu, you made your point and I agree about Miki being lazy. She's a great singer, but usually lacks at dancing, maybe it's that supposed back problem, I really hope it isn't.
I noticed her not-so-great dancing since Girl Koi no Victory, she was in the front and she was lacking in that area. I also think she should improve her dancing, specially since she's almost always in the front, and as someone noted, being next to Takkity (MM's and probably H!P's best dancer) just makes it more noticeable.
Also, Aika has trouble in the head shake move, she does it even worse than mikitty, and Koharu also underperforms there. Maybe other girls could've have done that dancing better, but since they have fixed positions, they had no other choice (reina is a fine dancer for example)
After watching both performances several times, I can see takkity's control over her whole body is impressive, I can only think of Rika having the same skill (both of em have great butts...
maybe that's the reason
). I will make some gifs later (I'm a premiere noob, so don't except anything great
)