PIA
A PIA relocation to LBA, is in my opinion, unlikely, unless they are prepared for a major reduction in capacity.
MAN has field availability that is quite superior to LBA, easilly able to take B777's. 2 runways @ 3,048m, 3,198 on request and RFF Cat 9, Cat 10 on request. In comparison, LBA offer 2,250m (TORA 2,113m (14) and 2,190m (32). RFF Cat7, 8-9 on request. MAN offers Cat 3 ILS on 23R and 05R.
The LBA field will give serious performance (pax and freight load) on B777 ops. A300's can operate, probably at the margins of economically, B777's cant.
I seriously doubt that LBA has any potential whatsoever to take the PIA MAN hub, and that they won't follow BA / BMI to LHR. LBA may however take some additional A300 ops.