Xizang was greatly improved under China. Let's face the truths: it's a mountainous country, that if independent, would be preyed upon by China and India, that has no agricultural or industrial potent whatsoever and is more or less just a Chinese outpost against India, which is why there has been any development there at all. Now food is real, in Xizang.

Also, borders, who cares about borders. Change them if some stupid rats' arses who need to go to hell get violent, but otherwise, just keep them as is. Who cares, we're all fellows. Changing borders is mainly irredentist rhetor, supported by governments (not just of their own folk, but of other folk who would be happy to weaken other governments - f.e. America wants independent Tibet since they can use this as a propoganda point of how authoritarian and inhumane China is and since Tibetan independence would weaken China a bit, and encourages Tibetan violence against Chinese that are in Xizang) and if you believe in it, they've succeeded in their goal. Nationalism is an usually government-directed propoganda.

Now Papua being divided into two: West Papuans have to be with the government of Indonesia, boo-hoo. Now folk from Java and Sumatra are migrating from their native lands to the great Papua, oh no. What's that? They're killing folk? Oh, no, we got to kill them, too.