Bhai its just words to an extent. If changing names which go back centuries will somehow improve Pakistan then so be it.
It will not stop a Sindhi being Sindhi, or me Punjabi or a Pathan from being a Pathan
India has created new Soobas, without feeling the need to change names.
Punjab in India is still Punjab, Rajasthan, is the same so is Gujrat etc
But if you feel somehow destroying what has existed in history for so long makes Pak a better place then so be it
And NO sooba based on caste creed colour religion or ethnicity PLEASE, the whole basis has to be administrative convenience, wih EVERY Pak Citizen having the right to live and work where they choose and to travel to its every nook and cranny without fear of reprisals or reprecussions.