I always tough coach was a bit unfair, at least during tournaments, but it seems USA has a different perspective about it. Well, i still don't like much coaching, and i think its dumb when a bunch of people just to teach someone who should have notice why he is losing. Specially in the top 8, nobody should be coached in the top 8.
But there is situations where is understandable, like when someone is completely lost, or his opponent is getting away with some gimmick, but that's it, beyond that i think its a bit bad.
But who am i to judge, US has teams, if they're being coached by their team members then is fair lol.