I would'nt bank on any more long haul expansion, Hugo.
PIA ( and before them Shaheen) are tapping in to a large market, West Yorkshire's Pakistani community. As BYALPHAINDIA mentioned, they could have done all this years ago so its not before time. I'm not familiar with the geographic origins ( ie which part of Pakistan) of the W Yorks community but another Pakistani destination could be possible, I suppose. Lahore, maybe ?