The argument about how frequently the ability to carry out an IMC letdown with a strong onshore wind is irrelevant. The SAR-H programme is mandated to provide a capability no less than that currently provided. So, if this procedure, which is used on SAROPs now, cannot be done once SAR-H comes in then the capability requirement has not been met.
However, once someone can explain how the procedure in question can be done using a 120 degree radar then the issue goes away.
CD