Application of PR would be independent of above & it just relies on my commitment to NZ...
Not "just". The applicant has to have held residence for two years, to have met any conditions on their residence visa, and to have good character, THEN comes the choice of 'commitment to New Zealand' criteria.
The 'time in NZ' is the most commonly used, but the others are all available. I think they are likely to remain so. Application for
Permanent Residence is already restricted, to those who have previously been granted residence. It is residence itself which is being made more difficult to attain as a result of the recent political manoeuvring. They are using that as the pinch-point.