I don’t see anything wrong with reclassifying if playing a D3 sport is going to provide an academic advantage and potential professional (real world) advantage. Reclassifying for the purpose of playing D3 sports is silly. Reclassifying to use sports to get into a NESCAC or similar isn’t.
A friend’s brother reclassified to play D3 football at Keene State. That’s silliness. It was even sillier his parents thought he was college material. He was home in a year. Looking back it’s amusing a professional guidance counselor (the mother) couldn’t see what was best for her own kid.
This thread has certainly pulled apart the myriad ways one can keep a kid back a year and more importantly the pros and cons of doing it.