A compromise- What about if i add 2 more 20yr olds after the last real game this week, taking our total to 18. I wont drop any players in the current team, and will play players based on game shape, with a focus still on winning. That way our best 20yr old will see court time, and our current team will not be dropped and have the opportunity to play. I'll be looking to scrimmage higher ranked teams if possible.
Of importance is also that the current team consists of 4 20yr olds already, emphasizing the strength of next seasons group. And the next 2 players in line for adding are both 20 yr olds anyway. So it wont be changing who is added regardless of age, the 20 yr olds would be next either way.