ns wasn't psl commissioner, neither pcb's consultant to bring int. Cricket back to pak - he was chairman pcb with utmost power & political lobby behind him; therefore you can't limit his objective to only 2 kpis - one is launched at least 3 years delayed than it should have been and other one is more hot air than substance.
Also, when psl was launched and zim first toured pak in 8 years, sk was the chairman, not ns. It was his political link that kept him involved in psl, otherwise i am not sure what was his designation to command such an influential role in psl. If it's commissioner psl, then may be his duel appointment of pcb chairman wasn't right - it's like nba commissioner heading us basketball federation as well.
As a pcb chairman, he had more failure than success and i can list them one by one, which i think is not necessary now, guy has left. Recent limited success of pak team also can be more attributed to arthur, ul haq & sarfraz - apart from sarfraz, ns can't be credited for appointing others, unless one can say that sk was a dummy, ns ran the show behind - but if so, that again doesn't sound good for previous pcb patron.
Since you mentioned, as doc, haroon rashid was appointed during ns's time, therefore you can't bypass ns from rashid's incompetence - even jo mou didn't blame bailey because he brought the guy paying 35mn!!!! I think, sk had been a fantastic pcb-c, who brought a sanity in pcb's operation - ns was just the beneficiary of the good job. One example i always give it that, for 6 years pak team went without any controversy, and lots, lots of credit for that should go to sk & misbah, not ns.
Before sk, previous few chairmen were incompetent & wrong headed, hence sk/ns's tenure looks so bright, but without that benchmark, hardly there is anything of flying colors.
Ns was a decent guy - at least didn't make a bankrupt into a beggar, but his tenure was hardly colorful, and guy used his media to promote himself more than pak cricket; and the lied too much for his position, which often got him exposed. His final bluff was the case against bcci, wasting lots of money just to convince people that he is screwing bcci.