I'll go away from the general sentiment here. Imran should NOT be the coach of the team. Give that to someone with actual coaching experience. I say this not because I think Imran would suck at it, but only because I believe Imran Khan would be much more useful as the head of the PCB. THATS the job that he needs to be doing. In charge of every damn thing, not just the coaching. Some time back Abdul Hafeez Kardar was the end-all be-all of Pakistan cricket. Our first captain, and later on head of the cricket board at the time. Completely autocratic, fearless, ruthless and a law unto himself. Revolutionized the game in Pakistan. You couldn't throw a cricket ball in an official capacity anywhere in the country without his say-so. Imran Khan himself said: After Kardar's retirement, Pakistan cricket was thrown to the wolves, the cricket bureaucrats whose progeny still rule the game. (This quote from Kardar's player page on CricInfo). That is the kind of person Imran was as a captain, and that is the kind of person we need at the top of our board. Imran is perfect to be that person. Give him a free hand and 5 years at the top without asking him for anything else.
But that will probably only be a fantasy. Imran may have suggested he wants to help but I don't believe that he will do so in any meaningful capacity, and let his political party go. That seems to be his first priority now. If he wants to help Pakistan cricket, it needs to be on a full time extended basis, not as a part time stop gap measure.