Yes - it is really an unnecessary complication to my mind. Re the Approach ban - the dilemma is that IF at the relevant point the met vis is below the 'published' minimum but the RVR is above...??? - which one do you take note of? I have never seen a plate like those plates posted here in Europe, so the problem has never arisen. Indeed the only time I have even seen a met vis minimum published was in the early Pristina days.