All I can think of is a far closer economic " Integration" with the US and the UK.
China could view this scenario as a bigger threat than a few subs because of China's reliance on competitively priced raw materials.
Xi has been purging moderate CCP Politburo factions but elections before the General Assembly maybe another matter. There will be a lot of angst towards Xi from numerous quarters of the CCP that just,want to get back to commercial business ,,,, which is what Australia wants . I don't expect Xi to be booted for face saving purposes but let's just wait and see whether or not Xi gets to wear the Chairman for Life cap. If he does, expect integration.