In the USA there are thousands of uncontrolled fields with IFR arrivals. This includes many fields with RPT Jet traffic. The system is only as good as the people using it. It works fine, they would not implement a system that was proven to be unsafe, and we wouldn't use one here if it was.
The reason for having the airports as CLass E airspace is to restrict VFR traffic movements during periods of low visibility and/or low ceilings. The approach controller separates arrivals and departures (often having a smaller aircraft wait while a jet shoots an approach and waiting for the Jet to report cancellation of IFR).
What you need is to get a copy of the airport/facility directory for the area you are interested in.. these are available from sportys.