after all his wins at big shows most breeder thought, wanja will bring only superpups. he made very good and excellent pups, a few really excellent.
so some people were disappointed about the general quality of the pups, but they didn´t look at the females.
as you said, and thats absolutely right, wanja mated a lot of "bad" females, especially in germany, but the result was mostly one class better than the female...so he did a good job for the breed.
but one thing i can´t understand is, that only very few breeders with topfemales came for mating. maybe the reason is, that just in this time (arround the year 2000) the trend (especially for the males) changed. more and more oversized and heavy maletypes won at the big shows...so there was no more place for a correct studdog.
a similar situation is benhur red del arco azzuro...he won some big shows, has the right blood, but in conformation he was out of fashion, means not in trend.
there is an old speaking: the trend is your friend! but this not always the best solution in dobermannbreeding.