PIA
I think it was inevitable that PIA would discontinue serving LBA. Undoubtedly there is a large catchment of ex-pats in West Yorkshire but it is simply not economic for a long-haul airline to fragment its operation across multiple airports in a distant country. The only exception to this is perhaps Emirates with their enormous resources and huge global hub at Dubai. PIA is a point to point operator from Europe, and the UK can be well-served from London and Manchester, with Birmingham perhaps the only viable other departure point. Glasgow has gone. For northern England MAN offers good surface transport connections and is free of any operating constraints. We'll see whether additional capacity is put into MAN to take up the displaced traffic.
PIA is coming to terms with commercial realities. As a government-run flag carrier its route network has no doubt been influenced historically by ex pat requirements as much as hard economics. The final reason may well be the retirement of the A310s and the lack of a suitable replacement which can cope with the operating constaints at LBA.
An independent airline might see an opportunity here to compete with PIA's MAN services. Air Blue currently go head to head from MAN, using the A319 via IST.