^You are completely upside down on Sunnah and Haidth. Imam MAlik wrote his book of Hadith much earlier than Shafi'i. Plz read about Muwatta IMam MAlik.
Secondly, tere are more than 100 verses of Quran asking obedience of Prophet. Do you consider all those verses redundant?
I know, Shafi was his student however Malik did not attribute evrything to the prophet but to the "elders of Medina". Plus Malik was not far away from the Abbasids and the Caliph Al Mansour. Sunnis would tell you Malik distanced himself from them, but which theologian you know ever does this? The Sufis do have a tradition of distancing themselves and still do today. But no cleric does that. There is no way to have authority without political support. Malik was the one who introduce the concept but later Shafi was the one who had to lay the case. They are the same group of people and the Abbasids simply tossed the Mu'tazilites to the curb. Especially during the reign of Mutawakkil. Its all in the same time period.
As time goes by things do seem to go backwards in Islam's history. People have noticed this and it was only after Shafi that hadith nearly always went back to the prophet. This is not just some Quranist talk, even secular historians have noticed this. Anyways for me its the contradiction with the Quran that I am interested with especially when it comes to freedom and legalism and individualism. Typical political themes and all the enemies of the ruling class.
7.120. But the sorcerers fell down prostrate in adoration.
121. Saying: "We believe in the Lord of the Worlds,-
122. "The Lord of Moses and Aaron."
123. Said Pharaoh: "Believe ye in Him before I give you permission? Surely this is a trick which ye have planned in the city to drive out its people: but soon shall ye know (the consequences). 124. "Be sure I will cut off your hands and your feet on apposite sides, and I will cause you all to die on the cross."
As far as the verses of the Quran i have dealt with it in this thread before and have explained that whatever the prophet said or ordered can not be far away from the Quran.
"Surely We have revealed the Book to you with the truth that you may judge between people by means of that which Allah has shown you; and be not an advocate on behalf of the treacherous." (4:105)
"And We have revealed to you the Book with the truth, verifying what is before it of the Book and a guardian over it, therefore judge between them by what Allah has revealed, and do not follow their low desires (to turn away) from the truth that has come to you;" (5:48)
"Allah is witness between you and me; and this Quran has been revealed to me that with it I may warn you and whomsoever it reaches." (6:19)
"We know best what they say, and you are not one to compel them; therefore remind him by means of the Quran who fears My Promise." (50:45)
10.15 But when Our Clear Signs are rehearsed unto them, those who rest not their hope on their meeting with Us, Say: "Bring us a reading other than this, or change this," Say: "It is not for me, of my own accord, to change it: I follow naught but what is revealed unto me: if I were to disobey my Lord, I should myself fear the penalty of a Great Day (to come)."
So it is not conceivable that the prophet will preach anything thats radical different than the Quran. There maybe everyday issues and issues that ocurred that he may have talked about and dealt with but as far as the teaching of the faith it can not be contradictory from the Quran.