I agree with most of what you said, except about the PRC's supposed claims to Vladivostok and Outer Mongolia. I'd like to see official PRC government statements about that one - I happen to know that the PRC has signed treaties resolving all territorial claim issues with Mongolia, the latest I believe in 1994.

Regarding Tibet, unfortunately I don't think it's going to matter. China views Tibet as a defining issue of national sovereignty without the complications of Taiwan, and there is absolutely no national desire to compromise on the issue. Like India and Kashmir, this one will likely be unresolved for decades to come.