My response to this is that it is going to complicate relations between the US and Pakistan.
Pakistan has been trying to have influence in Afghanistan because it does not want India (its major enemy) have serious ties to Afghanistan. If India did, Pakistan would feel hemmed in with enemies on both sides. The US has been trying to get Pakistan to stop helping the Taliban, America's enemy in the fighting in Afghanistan. But now Pakistan will probably redouble its efforts to have influence in Afghanistan and that will make it even harder for the US and Pakistan to have a good relationship.