No
answer is get the GA community to work together.
No pilot can argue that the EUR-GA_IMCR is not achievable.
The French would continue to be allowed to fly VFR on top,
the UK can continue the IMCR privileges
the big birds have guaranteed 500ft separation from GA
we can all fly airways with all the benefits of hand over, one transponder code per flight
lighter workload for ATC because all gets normalised