Whether you do age based in rec or grade based in club, there will always be a 1-2 year age spread throughout the leagues. I think the point is that the argument is stupid, and lacrosse players don't care. It is a great fabricated issue for parents of average players to ramble on about to create a drama in their own minds.
Myself and many others think the point of letting select children get an advantage other children do not get stupid. No one ever cared about the two year spread as every other year you were in the oldest group. I personally have heard several children talking to other children questioning them about being heldback. And these kids looked 12 years old. So many young players do care,