What is the strategic importance of Pak? Is it worth the funds, time and energy invested into it? Are the liabilities also being taken into consideration?
I think Pak was important as long as the upkeep was relatively small and the returns large. This equation is changing with Pak going down the drain, economic recession, and India's rise. So, pak is no more as important as it was. To China, upkeep of Pak and maintaining its stability and viability can prove very hard. It can have blowback effects(Ulighar).
Earlier, one could pay a paki(in uniform) and rely on him to get the work done, keep pakis united, keep poor pakis from revolting, keep radical pakis focused on India. But this is no more possible. It is precisely for this reason that US is unable to manage Pak. So, how will China succeed? Who will it depend on to get the work done? Can that person or group get the work done? Is it worth the risk for China? Is it worth the investment(that would be demanded and billed by the pakis)?
If US turns against Pak, then it introduces a new dynamic. Will a hostile US leave Pak intact to be used by China?