Note that the grade scale that Erik Kjær advocates to resemble the American grade scale:
12, 11, 10, 9, 8, 7, 6, 5, 3 and 0
is essentially the old Danish 13-scale, where 12 was substituted by 13.
I know that many instructors miss the old grading scale exactly because there is indeed a need for a grade '11' and because of the large span of qualities that grade 7 in the new system covers. It is really not the optimal (or fair) way to give grades.
So, we could just go back to the old 13-scale!?