India has not won. Pakistan has lost. That is the difference between your very perceptive and insightful analysis and my own view. India was not seeking Pakistani isolation; there is no national policy seeking that. Instead, there has been very effective Indian highlighting of her own position on various issues, and, of course, very strong messages to the world on the issue of terrorism, linked to specific acts of terrorism committed against India and Indian citizens.
It is time for Pakistan to seriously quell its own internal support and encouragement of terrorist groups and their overground sympathisers. Unfortunately, asymmetric warfare has been a special interest of the Pakistani military right from the inception of Pakistan and the start of the Pakistan Army; it will be difficult to stop people planning on such extra-military support and implementing complementary steps.
As for China, Pakistan is vulnerable to a serious Indian initiative - on a sustained, long-range basis extending across decades, not episodic or sporadic - to get closer to China. Seriously vulnerable. It has nothing to do with individuals, it has to do with the calculus of support in the world community and the possibility of gaining an ally who can influence that community favourably. India, at the moment, has that potential.
Pakistan needs not a tactical review but a strategic rethink.