Other nation's can 'suggest' all they want, but as the US failures in Vietnam, Iraq and Afghanistan illustrate, even superpowers cannot influence the direction of another nation as long as the people of that nation do not wish to do so themselves, and act purposefully to bring about that change.
For Pakistan such a moment (for its people to promote change) will arrive when the next elections take place - 'change' in this context is no so much about the PTI being elected and Imran Khan actually being able to turn things around dramatically, but 'change' in the context that hopefully a much larger percentage of the electorate will turn out to vote, and will vote in a majority of candidates from outside the established parties like the PPP, PML-N, ANP, MQM etc.
And what if things don`t work out then either? What if they people choose wrong again or don`t even get the choice to choose? Corrupt leaders have a hard time saying goodbye to power.