You mean like historical claims being terminated? You mean like vested foreign interest being lost? You mean like different allies?
What is a major change when it comes to the current conversation?
Seems like to their way of thinking it goes something like this:
The Russians imported communism and had a revolution ... somewhere along the line they perverted some other countries and just kidnapped others to form the Soviet "Union" - force has nothing to do with it, of course.
So even though it was primarily Russian run and controlled (with some imported thugs here and there - Stalin from Georgia) they dropped the "Russian" and became Soviets - of course, the rest of the world knew the difference - hence things like Russkies (Dr Strangelove), the "Russians Are Coming", "From Russia With Love", etc. Russians have a way of believing you should just naively accept what they tell you - for your own good.
The
Russians Soviets then planted Soviets (apparently currently Russians) throughout the Soviet Empire - pods like in "Invasion of the Body Snatchers". The planted "Soviets" are apparently now fully formed Russians - and natural citizens of non-Russian states. Naturally Russians being the superior beings, this doesn't work with the riff raff like Ukrainians or Georgians, and certainly not people from the 'Stans.
Now you get to the good stuff. Once the onetime not Russian captive states became free with the breakup of the last
Russian Soviet empire, these Ukrainian or whatever (not Russian) citizens have suddenly developed a hankering to be Russians ... something like Manchurian Candidates. That means the Russians (no longer Soviets) need to help those Russian (no longer Soviet Ukrainian or whatever) homeboys become good Russians. Of course you can only be a good Russian on Russian soil, so the no longer Soviet Russians naturally need to
steal rightfully appropriate other lands so their no longer Soviet or no longer Ukrainian Russians can be Real Russians and not Russians in exile. But the whole mess has nothing to do with Russians because the Soviets sowed Soviets (not Russians) around the empire - ie Russia not at fault.
Or in other words, the Russians invented the Soviet Union, absorbed a lot of non Russians into the Soviet Union, and homogenized the mess. Then to their thinking since Russians are spread all over the former empire, all lands that made up the empire should be Russian since the Russian seeds were planted and grew in all those places.