In the different project birds here I have some with short tight feathering over the hocks, some vulture hocks and some with soft, profuse feathering that wraps around the back...I think this might be what your bird has. I asked a judge about it and he said 'it's not vulture hocks but it's not good either. It would be a judge's call, probably wouldn't be disqualified but would lose out over a bird with clean hocks'.
I do not know how hard it will be to breed out but I'm going to try. What are your options? Do you have a better male?