Again, what those people had built after the "deed had been done" to their ancestors is a natural growth of a culture. Like it or not, what they have built is a viable culture that is independent of Earth's culture from where they came....There is nothing at all that is "natural" about the development of those people. Their creation was the result of a criminal act done without the consent or participation of the original inhabitants. They are morally entitled to the truth about the origins and the reality of their situation.
Maybe the Prime Directive might someday ("someday" after DSC's time) be revised to tackle a situation like this, and perhaps this specific event is what might lead to that revision, but for now it seems plausible that General Order One can be justifiably interpreted the way that Pike interpreted it.
Yes. Pike's compromise had wisdom behind it. It does not destroy their culture from outside, but planted the seeds for change from within, if the culture decides it.And now they have Jacob to do that.