these were "game changers" because they gave you parity with India which you didn't have .... hope that makes it clear...
bottom line:
Pakistan's missile program did receive help from china and NK, that doesn't discount any of pak's indigenous effort.
Pakistan's missile program has had immense success and the capability they possess now places their scientist and engineers among world's best.
USA has aided pakistan with weapon system which have been back bone of minimal credible deterrence against India.
Apart from that, if you insist that china's role has been more crucial than that of US, then it is your opinion, but me (and your own military) differ in that. If that was the case, pakistan would start putting its eggs in chinese basket, wouldn't they.
I think the support has been equal..
Its never been a case of cake batter from there and icing from there.
Its been a mix of both to make the whole cake.
The initial guidance systems were based of an amalgamation of Chinese and European designs..
Current ones have no input whatsoever.
The US's input was greatest with that tomahawk.. and some part of the harpoon.
Since they both provided a learning example of where to start from and what to include.
The Shaheen series for eg.. was initially developed by people who were nuclear scientists by profession!...who literally had to pick up a book on basic rocketeering and begin reading about it.
And as much as the crap about M-11's being the Shaheen posted.. there was very little input from the M-11 into the Shaheen apart from the usual hands on example to look at.
Ideas from it.. and other sources(literature, sourced plans..etc).. were used into the Shaheen series.
The NK hand has been mostly just purchase and deploy...nobody likes the liquid fuelled variety that much.
and the Nodongs were only needed as a quick fix to the need for a deployment system.