^ Well, Ima Koko Kara's dance was suppose to be simple cause I think one point of it is so that other kids can dance along (and not the backup dancer kids, I mean the PreCure young audience represented by the backup dancers) and also it was based on the anime movie's dance, so I'm assuming UF didn't make the choreography (or didn't change the original choreography that much).
I noticed Maachan's piano was less exaggerated than the concert performance, which I'm guessing was because there's closeup for this PV and there's not really a closeup during the concert, and totally love Maachan
I agree about Ayumi looking more stunning with her new haircut.