Dear Mr Shafqat,
Parwez clearly spells out his method of explaining the Qur'an. Please note that he never claims that his method is through a direct translation. There is a difference between an "Exposition" and a "Translation". Once you read the preface, you know what the book is about and also that the author is honest enough to explain his method.
After that, it is up to you to accept it or not.
BTW any hadith or Sunnat that goes against The Criterion can be safely avoided. Deen cannot be based on conjecture, either. BTW which Hadith collection? Shia or Sunni? Which Sunnat? Shia, Sunni, Barelvi, Deobandi, Ahle Hadith, Ismaili, Ahle Fiqh, Ahle Sunnat? You decide.
We follow certain practices handed down through each generation as long as they don't violate the basic values of the Qur'an.
All the best.