I ask why this compulsion of 'integration' or 'acclimatization' ? We didn't fight for Pakistan so that we can have, as some ethno-nationalist say : Hamara Tarekhi Watan or 'Our Ancestral Lands'; we fought under the banner of 'Muslim Nationalism' which means a Pakistani can identity himself in whatever way he or she likes ! Thats one of the reasons why I'm so against making the majority regional language compulsory on anyone; instead give them a choice to study Urdu, English and any other regional language of choice simply because it would help us understand each other but don't forcibly shove it down their throats that 'No because your in Punjab or in Sindh you're going to have to learn that language...no ifs no buts...' No don't do anything like that ! And thank God in Punjab we don't ! I love the Punjabi language even though I'm an ethnic Kashmiri simply because no one forced it upon me ! So I think the call for Mohajirs to integrate or acclimatize is wrong ! They don't have to....!
On the Provinces thing - I say break all of them up ! Let each and every Division, something which is already created on Administrative lines, become a Province and devolve as much power as you can to them so that the elected representatives are even more answerable to the People on a localized level !
There is no compulsion to 'acclimatize'. Many Urdu speakers do not speak Punjabi or Sindhi living in Punjab or interior Sindh, & they get along with Sindhis & Punjabis very well. I do not speak Sindhi, yet, I get along excellently with Sindhi people in Jamshoro & Kotri, & elsewhere in interior Sindh. But, as long as you are respectful to the local conditions & populace, as long as you don't try to cause divisions, you will be respected as well. And the MQM has failed to do that. Good people get along with each other regardless of ethnicity, it's pretty simple.