I'm going to go out on a limb here and say that episode 24 is definitely the weakest of the series.

That dance routine, I mean, just sinful. They should have changed the song. It just didn't mesh with the world at all, it wasn't in context; felt like a rush-job.

Un-reinforced fanservice that lacked the charm or grace of some of the equivalent culture-fest fanservice in Haruhi.
Bah...

Well, they had to go out one way or another, and Lucky Star isn't conducive to climactic endings, maybe they should have acknowledged that fact more in this episode.

meh...