There is a big difference in line breeding as opposed to inbreeding.
When Buckeroo appears in a pedigree as grandsire or great grandsire, the genes are diluted by the many other horses who appear in the pedigree.
For years, dog breeders and horse breeders have used line breeding successfully.
Some of our minis have a lot of Buckeroo. Some do not have any. It is a matter of preference. It sounds as if you have a bias against the Buckeroo breeding.
One thing I'll say about the Buckeroo lines is that the temperament is superb. Buckeroo has consistently produced stunning offspring over the years. Yes, there has been a lot of hype, but much of that is very well deserved. We have a Buckeroo son who is the most biddable stallion. He is a gentleman and is never hard to handle. He has produced many National Champions. These horses have included very Arab looking, refined minis which is the current trend.
Buckeroo has made a tremendous impact on miniatures. There is no doubt about that. I appreciate that fact. He is a prepotent stallion and has offered good conformation, great temperament and many other good things.
There are other good stallions out there also. The goal of a breeder should be to produce the "next superior horse" whatever the breeding.
It is hard to know exactly what horse from what bloodline is going to do that for you. That is the challenge.