Simply, let free and fair elections happen. Imran Khan will win a majority, let him complete his 4 year term. Let fauj focus on their role which is external and internal defence of the country's ideology.
In that period, any changes he makes for better or worse will still pull country into the right direction. And in time our democratic system will become strong enough to steer us in the direction the awam wants us to go in. If IK is not good, he will not come back in next election.
Democracies take time to grow. We have either had a dictatorship or hybrid democracy. And the hybrid democracies hurt us the most. Pick one and stick by it.