Not so much to do with the current designation of clowder, but rather I was inspired by the origin of the word.

A variation, recorded since 1801, of clutter, itself from clot, from Old English clott (“round mass, lump”), from Proto-Germanic *klūtaz (hence cognate with Dutch kloot (“ball, testicle”), Danish klods (“a block, lump”) and German Klotz (“lump, block”)).

As for murder, I think labelling them with their intent is simply a good idea.

I've nothing against crows or cats, but the person who coined their respective collective nouns probably did.