I don't see why Pakistan should change its policy of promoting Islam in Central Asia. That region is within Pakistan's grasp. The truth is, Central Asians have been too damaged and traumatized by decades of brutal Soviet authoritarian rule and communism. On top of that, they are ruled by autocratic states that are dependent on Russia, and those highly authoritarian states of Central Asia are trying their level best to prevent an Islamic resurgence. Nevertheless, the ordinary people of Central Asia are fast rediscovering their Islamic faith and personal piety is seeing a revival. Authoritarian regimes can try to limit and control Religion as much as possible, but they can never satiate the spiritual thirst of their people with shallow patriotism and nationalism. Anyone who considers himself a proponent of the Islamic cause (which I realize is not going to encompass the entirety of the Muslim community, a large fraction of our community is only nominally Muslim, and prioritize other identities before their Religion, or are otherwise drowning in a secular lifestyle), must realize that the greatest adversaries to our cause are two nations: Russia and China. Both are committed to preventing an Islamic resurgence within their own borders and in Central Asia.
Now that the Taliban are coming back into the thick of things, and will have a considerable presence in any future Afghan government, Pakistan should seriously reconsider its position on promoting Islam in Central Asia. This policy succeeded big time in both NWFP and Baluchistan. Conservative religious groups like Tablighi Jamaat, Ahle Hadith, etc., went into those provinces, and were so successful in their evangelism they radically transformed the societies thus decimating popular support for leftism and ethnic separatism. That is essentially how Pakistan won the war in Baluchistan and managed to decimate the separatist insurrection.