NAB is an independent institution as per constitution. Only Chairman NAB can change NAB’s prosecution team. PM can’t.
As far as today’s decision is concerned , it reflects more on judges mindset rather than prosecutors’ performance. If judges put burden of proof on prosecutors which they did in this case, Nawaz was going to be released. If burden of proof was put on Sharif, he would still have been in jail. Law of the land demanded that it would have been the latter case but Justice Athar thought otherwise.
I agree with your observation about Buzdar. He is the result of IK’s Zidd. Otherwise, Buzdar has nothing in him.