^^
Misbah isn't the worst choice - at least guy has enough experience at highest level, enough education to apply scientific approach in scouting and he has a genuine passion for the game.
Problem is, Misbah comes with lots of negative connotation - he himself prolonged career, he was the mastermind of sticking to a group of players (which gave him a very steady squad in their comfort zone), he was "safety first" Captain of the highest order, he used (abused) his position as Captain to safe guard his spot both for National team and in PSL..... and he has made lots of enemy in PAK media circle.
Regarding the appointment of Misbah as CS - I'll say No & Yes.
No, in a sense that the autonomy and authority that Inzi was given, if Misbah is given such, I don't think PAK team will move forward much. One by one, he got rid of every batsman that went after the bowling - Jamshed, Umar, Maksood, Amin ... even Sharjeel or Fakhar didn't get much opportunity under him. And, for bowling as well, his picks were safety first (in terms of RR) - he won't promote attacking spinners, raw fast bowlers, because they can bleed boundary. Ajmal with old action was a bit freak, but otherwise his spinners were often very tight ones - less exciting, but very steady. And, he liked senior players - players with good number of years in FC cricket under belt, because it's easier to manage experienced teams. Handling younger players need lots of on field guidance, which isn't Misbah's strength - he might remain same as CS as well (Inzi didn't change much as CS from his Captaincy days).
But, having said that, I am sure there will be some amendments in the scope of CS under Wasim Khan. This is one role that has no loser (or winner) at current state - an useless position with lots (or very little) of power without any measurable accountability. A CS can't be that powerful like Inzi in an useless job that basically doesn't force any accountability, neither demands direct results (otherwise Inzi should have been asked to return part of his salary with his termination paper for selecting that squad for Asia Cup, including 6 pacers in desert). Inzi has milked lot (monitory as well) from that CT win, for which few of his first picks had to be withdrawn for some reasons; BUT no one is asking him regarding PAK's WC squad including his nephew (yes, despite his disgraceful 100 against BD) - because, the accountability of CS isn't defined in cricket (not only in PCB, the Indian guy did even worse, because he had better options available).
I believe, it'll change now - at least partially. Weather, Arthur is reappointed or PCB goes for a new guy, I am sure next CS will not be allowed to score in open net like this - the next Head Coach will demand some space on the job of the CS. And, if PCB appoints a Deshi great as HC .... you know, he won't allowanother Deshi great to impose 15 players on him for a job that he is the one to deliver with those players - it would have been a show worth watching - CS Inzi V HC WY/Javed

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In an ideal case scenario, say Arthur is reappointed (should be, now he has 3+ years experience in PAK cricket culture, and guy is a good coach - anyone who can make a Babar Azam out of that sh!tty system deserves every praise), I don't mind Misbah as CS as long as the knot of the strings are at Arthur's hand. He'll set selection criteria, and performance KPI .... then ask Misbah (& his team) to comb across entire PAK to find the right match (s) - finally, the HC, CS, Captain and technical coaches pick the squad/back-ups - it can work. Because, Misbah is extremely dedicated, hard working, sincere to details, educated enough to bring Data Analytics into his scouting and a man of honor. BUT, he needs guidance - he is a sort of middle manager, who performs very well under capable boss, someone on top with authority and proper spirit. Under Shahriar, he kept PAK team perfectly decent, for 6 years!!!! - a monumental achievement, same can happen for methodical scouting as well.
Personally, I'll go for Mo Wasim as CS with a young team, people who are still active in game, has the drive to watch lots of cricket, and don't carry baggage of greatness on shoulders. PAK needs low profile guys in it's cricket - Wasim Khan is one; Mo Wasim, Bazid Khan, Kabir Khan, Taufique Umar .... these are the people who should do better than Greats like WY, Javed, Qadir, Wasim, MoYo, YK, M/M Khan*, Latif .....