I think you are correct with NK.
The article on Russia misses out that there will be plenty of power struggle after Putin, unless somebody snags the reins pretty much instantaneously. There is so much money and power and influence to be made immediately after he is gone that the layer he controls today will be frothing mad to secure their shares before any of the others do. As the article points out, the current regime is built upon the most corrupt pitted against each other and controlled only by Putin. I think it will be dog eat dog that sends waves and ripples through Russian society and will weaken Russia as a threat for a long time to come, similar to the fall of the Soviet Union.
Finally Vance has the charm of a dirty hotel towel and would not get away with half of what Trump does. He is a convenient front for the puppet masters though. Actually I doubt very few of the Trump circle today would have what it takes to replace him. Trump is a one in a billion combo of ruthlessness, narcissism and charisma.
All the above is my guesswork from the impressions I've gathered, of course. We'll just have to sit and watch when it eventually happens.