Agree, pics say it best...
If he's all you have to work with, OR you have the capacity and capability to set up a separate pen for him, then I would try him out if there's a heavier weight of pros than cons in him... I would aim for producing another cockerel comparable to him as close as possible but without leakage to replace him with... and I would either mark every pullet from him to test breed for leakage once they grow out, or cull them since they'll hide the leakage if they inherit it...
I dealt with leakage before in my Am's and actually ended up pulling out a nice cockerel for a friend from that line... so it *can* be worked with/around/out, just depends on if what he brings in positives is worth the time, effort and headaches, lol...