Not really fair to old Gorby. That political system was crumbling, and there wasn't really anything he could have done to save it.
As to whether the Russians want the USSR back, might I suggest a different take?
The USSR was merely the most recent implementation of a Russian policy that goes back to well before the Communist takeover - the Russian heartland being protected by conquering all the bordering nations, and ruling them as subordinate provinces.
The old Imperial Russia liked to style itself as the latest incarnation of the Roman Empire. And in some ways it fits - the Roman Republic also expanded in part due to paranoia, but also so that they could do a whole lot of looting. Most of Rome's cool technologies came from other people they had conquered.
Eventually Rome had expanded its empire to the point where the boundaries were ocean, desert, and peoples who could not be conquered, or who were simply not worth the expense of conquering.
And having run out of anything to feed on, it began to decline.