A few kids born in summer does not make these teams full of holdbacks 1-2 years older. That's a weak argument. Plus the coaches just pick from the best at tryouts and the best kids will go to the best coaches. Don't say you chose to have no holdbacks (or leave them behind for Denver). It's just the best kids chose not to tryout for your team. If the rules changed the same teams would be good, it might just mean 3 or 4 kids might change.