Another possible idea for a Sheridan upgrade (possibly done later in the war, around the same time that the "Stingray Juniors" were being made) would be fitting a Stingray turret (
which has been done) or an M8 AGS turret on the Sheridan chassis. If they used the M8 turret, at least in a hull down position you could slap on the Level 3 up armor kit to make it able to take 30mm hits.