I’ll look up the best link later. The key thing is that his model’s results depends on assumptions that don’t match reality. I don’t doubt he is correct if his assumptions hold. There is no reason to think his assumptions are correct.
Let us imagine, however, for a moment that his genetic entropy argument is correct. What would that mean?
We still have positive evidence for common descent. Perhaps God is just fixing some of the detrimental mutations that arise, and thereby preserving out population longer than otherwise possible. This would be a better explanation of the data than dismissing the evidence for common descent.
For this reason, it doesn’t really matter if you agree with Sanford’s argument or not. Either way there are patterns in the data that, for now, are only quantitatively explained by common descent.