Growing up in NJ, I would think that every fly car system could triage a patient back to the BLS crew. Sometimes BLS should call ALS because ALS knows more, or has more tools to evaluate.... even if the medic says "nah, your good, take them to the hospital" that doesn't indicate that the BLS was wrong, only that the medic is more educated and has more toys to determine that the patient is stable.
Even on a ALS truck with an EMT/Medic, if the patient requires ALS, the medic treats, if the call is BLS, or the ALS dispatch is not an ALS patient, once a 12 lead is clear, the patient goes in BLS.