With everyone following the lead of the grade one bands for uniforming, aren't we then falling back into the 'cookie cutter band' look, just with a different color shirt and hose?

I think the best bet would be to simply make sure everyone's wearing the same thing (hence the term uniform), regardless of the colors eventually chosen. I would hope that everything coordinates (not necessarily match, but at least doesn't clash). A band (whether competing or not) can then appear professional and still have their own look.