When Russia withdraws from Ukraine, Georgia, and Transnistria, when it democratizes and abandons its fascistic strongman model of government, when it decides to liberalize and fully join the Democratic Community it will not only have nothing to fear it will be one of the leaders of a new world order.
Your scenario not only asks Russia to abandon its' regional interests but also tells Russia to stop being Russia which in turn would possibly lead to its break down into smaller states - as what you're asking for Russia to do, is to ignore its' past and history and to completely restructure the Russian mentality.
This was already attempted in the 90's, it failed miserably.
As to Russia's involvement in Eastern Ukraine, not unlike the US is Keene to do when it suits our interests, wink wink, nod nod, they are supporting a people fighting for self determination. Something we hear Americans cry all the time!
Killing one person is murder, killing 100,000 is foreign policy
It didn't work in the 90's when Western/Russian "experts" pushed Russia's political pendulum into a "liberal" direction way too hard, to a point it simply swung back on them, and it's not going to work now either.
It's very simple, yet for some reason still so hard to comprehend.