What's ironic is that when my kids played at a local club, there was a better coach/player ratio than when were at the big clubs. At the local clubs, one of our teams had a volunteer assistant and the other team had a paid assistant (who coached another team as well). These assistants weren't just "fill-in" coaches when the head coach was absent. The assistants actually were involved with the training sessions and allowed certain players to get personal attention when needed.
Contrast that with the big clubs we've been at, most of them only had one coach who had 3-4 other teams. Most of them didn't have assistant coaches and the teams that did have an assistant coach, it was more like having two parallel coaches. The coaches traded practices and games and almost never coached/trained the team simultaneously. Instead of it being a "2-for-1" deal, the coaches often weren't on the same page, which created it's on set of problems.
Though I will say when we had one coach with 3-4 teams, the coaching conflicts were pretty minimal during the summer and league play. It was usually during State/National Cup and major tournaments where it reared its ugly head. I remember one year my son's U-Little team had 4 different coaches in 4 different games. None of them were the head coach and non of them had coached the team prior. Needlessly to say there were some unhappy parents and confused kids.
I agree with the above post, I think the drill-down of coach's priority goes like this when there's a conflict:
Flight 1/Gold team
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Coaches son/daughter's team
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Team with the highest Winning Record
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Olders
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Youngers
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Existing "B" team
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New "B", "C", or "D" team
If you're joining a newly formed "B" or "C" U-Little team at a big club you're pretty much screwed.