So Dick, you finally admit that the service you're getting in the US is not as per the NAS model but the result of over-servicing and controllers ignoring the the very airspace model you're wanting to introduce.
If you believe the system worked as per spec then that system is incredibly broken - it nearly killed a 737 full of pax. Without TCAS there's every chance they would have flown right though the Tobago because the Tobago pilot clearly didn't have a clue. When the lowest common denominator is a clueless VFR you're in trouble - E is a system designed to fail.