Has there ever been problems with people running Necos at serious tourneys before?
Seriously, if there hasn't, don't make an issue out of a non-issue, you're being silly if you do. Mech and Neco is still interesting to me, I'm sure Neco Arc Chaos will be garbage that nobody uses when there is money on the line. Kohaku and Mecha is a serious team I would imagine and there's no point in complaining over it.
Well I guess I have seen a Neco Arc once in an MBAA tourney, so who knows.