Upvote:0
I think the main issue for the "6-points" proposition you mention to become a reality is chronology: AYub Khan ended in 1969 its presidency, and only two years later the 1971 India-Pakistan war forced the secession of the 2 Pakistan into Pakistan and Bangladesh.
So basically the "natural" resistance of a political and social system in place to be changed delayed any division of East Pakistan, and any further attempts could not be made because of the outcome of 1971 war.
EDIT:
By "natural resistance" I speak about the fact that a political system is made of institutions and people in those institutions: to make those institutions change, one needs to convince people in these institutions. Time needed for that is "natural resistance"