That will drag Pakistan in the middle of a global power tussle so right now its a bad idea as if offers no solid benefits to Pakistan.
And what exactly we have been doing in Afghanistan all this time? It is beyond time now where Pakistan could worry about how others would react, world is changing fast and new alliances are being formed, countries are sending out clear signals about how they intend to proceed and which block they want to be related and work with. We f**kd our economy and peace being all time ally of one super power only. I personally view decision of not engaging with Russia right from the start as diplomatic failure of all times.
Pakistan needs to speed up its diplomacy decisions, we need to come out of loyal to only one super power syndrome, that has not paid us well, we need to look at new opportunities and act fast.