1. FATA Pashtuns themselves do not want to be part of Khyber Pakhtunkhwa it seems. FATA tribals dislike outsiders of any sorts including Pashtuns from other tribes or regions. Apparently they refused to even accept Baba Ahmed Shah Abdali (rahmatullahi alaih) and his rule.
I read that a few months back Imran Khan's PTI was the most popular party in FATA.
2. Pashtuns of Junoobi Pakhtunkhwa definitely need to be supported. PMAP are doing a lot of good work there and the ANP has called for the creation of a Junoobi Pakhtunkhwa province.
3. Khan i Azam, Shaheed Baba Abdus Samad Khan Achakzai (rahmatullahi alaih) was from the administrative borders of Balochistan but was a Pashtun leader. Bugti was a feudal landlord and a Balochi. He was corrupt and a Pakistani politician. The great Khan i Azam is very different and far superior to the likes of Bugti.
4. If a south Punjab is created, then this will just encourage supporters of other provinces e.g.
Urban Sindh (many Mohajirs are calling for this now)
If these are ever created then they could lead to a call for a Makran province, a Gilgit province, Potowar province etc.
Afghanistan which is smaller than Pakistan has 30-40 provinces, far more than Pakistan's 4.
However provincial reform in rural areas means nothing unless there is an end to feudalism.
It remains to be seen what will happen.