I don't remember the MRVA they let you down while passing overhead Samedan, I think it was somewhat around FL140?
arrived at this altitude over the field there are only 2 possibilities:
first one: you see the airport and there is enough space to descend into the valley VFR
second one: you don't see the airport
in any other cases than case number one you have to divert. it's as easy as that.