First of all my appreciation on the detailed analysis and suggestions.
But you forget one important thing, if US stops supporting Pakistan, which would mea it has to heed its ears to India. If happens so, then Terrorism upon India would also be wiped.
if terrorism is wiped from India, US believes India would go on to become Super power, which they doesn't want.
I do not think the administration is ever going to change it stance on Pakistan, atleast Publicly.