From what I have read, I believe that Alahazrat's fatawa have sufficient proofs to refute these sha'dhiyyah. In scores of places he's explained the principles in great detail, complete with references from books of hanafi usul. Oh yes that book is worth reading too, especially the opening and ending passages - he movingly writes that this deen has been watered with the blood of martyrs and that it is a moral obligation to defend it's practices and prevent people from trifling with it's principles. He says, we are sinners and do not claim ismah, but this deen of ours is too precious to be left to those who wish to distort it suit their personal tastes. This then, if nothing else, should encourage us to refute the likes of saqib.