Thank Jason for this one. He never made any promises about accuracy of thin slicing, except statistically. And S&L is toying with suspension right out of the gate.
Reasons are... not very strong. The art of the dad is irritatingly substandard, for example. It is as if they focused on the runt so much that they burned out by the time they had to drow the dad.
Also, I looked at the parent manga, and it's not KnJ. I suppose that's both good and bad, depending.