Pakistan will struggle to qualify under any coach.
Time after time, Pakistan cricket team shows everyone how average a team it is yet fans still believe that the team still has the chance of winning World Cups. Why do you keep that expectation? Just because we have won a couple of World Cups against all odds in the past doesn't mean it's gonna happen again. The previous World Cups were won because those teams had genuine world beaters. The current team doesn't have any.
Teams win when they have skillful, talented players on their roster. Pakistan doesn't possess a single match winner in its side. Yeah even Babar and Shaheen, though good players, aren't match winners. Babar will score pretty centuries but won't win you a match consistently like Kohli, Smith, Buttler, Warner does for their teams. And similarly Shaheen will give you a good bowling performance but cannot win you a match from a position of lets say the opposition requiring 50 runs with 6 wickets in hand. Both Babar and Shaheen require supporting acts from other players. And Pakistan doesn't possess great players.
The problem of expectations by fans stem from the situation where Pakistan team wins one odd match against the big boys and suddenly everyone starts believing that Pakistan is onto something. Pakistan beating New Zealand and England in the World Cup doesn't mean Pakistan is a superior team or not an average team. The quality of an international side is reflected from its series wins. How many ODI series wins have Pakistan had against England, Australia, South Africa, India and New Zealand, home or away, in the last 5 years. I would think 0.
Pakistan's level at the moment is SL, Bangladesh, WI and Afghanistan. That is the truth. Doesn't mean Pakistan can't get better, but seeing that all our ODI series wins are coming against WI, SL and Bangladesh should tell you that that is the level. Not one person here can 100% confidently say that if a tournament was to be played between Pakistan, SL, WI, Bangladesh, Afghanistan, Ireland and Zimbabwe, that Pakistan would win that tournament hands down. In fact many people would be afraid that Pakistan might not even end up in the top 3. Yet we dream of winning World Cups.
The road to redemption for Pakistan team is a long one. Until we can get high quality players from the domestic, no amount of coaching can get this team to win ODI series against the big boys, let alone a World Cup.