So here lies the problem when an aircraft actually needs to use an enroute adequate port, and the prob fog becomes a reality , Houston we have a problem
That's why Adequate assessment (ceiling Viz and crosswind) are for Lawyers to allow ETOPS.
Suitable/Acceptable assessment is for pilots and planning on the day sh+t hits the fan.
You can have one as an ADQ but not also as ALT at the same time.
FFRATS