Thats the big question.Perhaps this briefing explains the assessment:. Not directed at you @Temstar, but why would Russia want to occupy all of Ukraine?
Maybe the question should now be, not does Russia want, but does Russia achieve the security zone its looking to create if it does not? Or at least take a significant part of the remainder in order to leave a very small and insignificant rump in the West?
If a large and still viable state is left beyond the main pro-Russian areas, its pretty clear now that this remaining state of the Ukraine will continue to be turned into an armed camp with the prospect of restarting the war on what the Ukrainians would like to believe to be favorable terms.
Is replacing a relatively small line of contact along the front lines of a frozen conflict with a new much larger version of the same really a worthwhile objective?
So do I see the Pro-Russian forces going much further than the obvious areas? Well yes, but not necessarily with full participation of the RuAF themselves. I see this as a job for the local militia's which is close to the war that I suspect the Russians always were looking to fight.
Nor of course does this have to be lighting conflict, but I am sure they are happy to have one that grinds on for a quiet a period, pushing ever deeper into the Ukrainian heartlands.
Maybe of course we will instead a grand finale as Poland moves in and annexes the West and the Belo-Berussians descend into the heartland from the north and everybody conducts a dismemberment.