Having experienced that first hand, Deng implemented the term limit, so that there won't be a position of absolute power for the rest of one's life (it's just too much a temptation and thus recipe for chaos every 20-30 years or so).
Now that the term limit is gone, I don't think the transition would be as smooth as the past two decades.
No... the man had zero sympathies for the civil state.
He just planned to stay in power way longer, and organised it so that all senior party men coming after him will be in compromised positions.
Similarly, Jiang never left the power on good terms, but with a hefty pack of compromising info on party elites, and arranging for new coming leadership being very weak.
Only Hu possibly left the power unconditionally, and without any power left, but only because he was weak.
The long answer is Stalin's supporters said the exact same things. And it's not a surprise -- Xi is borrowing a lot from Stalin's centralization playbook, including "restructuring" the PLA (i.e., purging generals who weren't loyal to him personally and ensuring he has a Party loyalist on every ship) and developing the rank and file (to replace the Party leaders he purged in "corruption scandals"). However, this time around, those of us outside the system smells the b.s. a mile away.
China would be wise to remember that Stalin came thisclose to losing WWII because of these changes. Purging military leaders may make them loyal to you, but it doesn't make them good at their actual jobs.
RE: the PLA and the party membership, I was referring to changes that mostly took place during the 1990s, which had much broader implications on the locations of structural power within the PRC than anything that’s been done in the last decade.
I definitely think politics are less unified in China that it may appear, and the whole situation with Jack Ma is an example of "multiple power centers bumping into each other".
The next General Secretary of the party and Chairman of the CMC would both be elected by the party's Central Committee. Whoever is selected as General Secretary will most likely also be chosen as President, since this is mostly a ceremonial role. The majority of the Central Committee are in the same faction as Xi is currently, so it seems more likely than not that they'll find people from within their ranks to fill these positions and attempt to strengthen the collective leadership.