Single Spey
A question for clarity if I may?
Once outside the ATZ do you leave the frequency or do you still expect to receive some kind of service? What service..if any...would that be, and how do you interpret your responsibilities to other airspace users?
A scenario might be that the approach controller will issue a descent clearance which takes into account all known and relevant traffic that is complying with a "not above" restriction. Perhaps the controller's worload in such case may remove the need to transmit a string of traffic information on VFR traffic which does not wish NOR IS REQUIRED to comply in the type of airspace you describe. Can you guarantee in all circumstances that you would spot IFR traffic descending through cloud with sufficient time to avoid, particularly from behind and above?