One kid didn't make the trip, so that shortens all your lines down and ice time should be fine, right?. The kid that left was familiar with the coaching style, as he and my son had played multiple tourneys under EK.
Regardless of what you think the Brick is, it is a big tournament. If your kid gets to Edmonton and can't handle the speed or physical play of the kids, or is making plays that he shouldn't, do you continue to play him every shift - or do you do your job as a coach and fit him in where you see necessary, even if that means every other shift? These kids are 10, I get it. But if you watch the level of play, you'd be shocked.
Sorry that the coach yelled at your 6 year old, but you sound like you're practicing to make excuses for him in the future.