Iiuc ea (and most lower leagues including ayso) will be done on a sy but still by age, not by grade level. So it’s not really possible to redshirt them (you can only play up)…you still need to produce birth certificates. So Oct-Dec players will grow up with a shot at the most elite programs as Youngers, will be the strongest going to ea (which are the early puberty years where size makes the most difference) and be noticed by coaches as potentials to be pulled down when mls opens up (these players will be marked as Oct-Dec possible biobands when recruiting comes along) so they’ll just get pulled down 1 to play by.