You’re all full of crap, this new OP is great.  See it here, if you haven’t already.  And why do I like it, and disagree with all the other fans?  Two reasons.  One, I loathed the original OP and its variations.  As I made clear once already, I really like upbeat tunes to go with my anime.

However, here’s point two:  it works.  I know you’re horrified, but think of what the show’s situation was before and what it is now.  As the OP actually makes really clear to me — as in, I hadn’t realized it before I watched the OP — at this point in the series the three girls featured in the OP are basically the new power in the school.  Yes, Sachiko and Rei are still there, and in charge, but they’re going to be getting busy if traditions of high school anime stories have led me to expect anything:  they’re about to graduate, yo.  And the council will be markedly different with these girls running things.  They’re all high energy, quirky, peculiar, and generally lovable.  This is the OP that suits them, rather than the previous one, which suits their respective big sisters.

Oh, and this is pretty funny.