It wasn't a matter of diversity, just cramming all the kawaii CLAMP things together.
Oh, obviously! I just expected to see Kero alone in the CCS mascot role.

I dunno, I can't get sour about the characteres who weren't there because I never *expected* them to be there. This was a main characters + fluffy mascots things, with a few extras in the series with very few people. *shrugs*