Well, they all used to go there but there's no point anymore. There's not enough traffic to sustain it that even BA pulled out. KHI isn't really in a great place for connections to anywhere (except India... but obviously that doesn't work), PK is a poor airline at best, and the political situation in Pakistan is too dangerous for most people to consider transiting through there. That would be almost like asking people on the street if they'd like to transit through KBL. That's not to mention the meteoric rise of DXB and other ME airports in the last 10 years.