Well the good news - for now - is that Russia has been publicly shown to be a busted flush and a very unreliable source of backing.
The ancient wisdom of not interrupting an enemy making mistakes still holds true.
However if Putin abandons his Syrian distractions, it may mean a tougher time for Ukraine.
The logical - if unChristian and unsympathetic - course of action is to stay well out of it. Any attempt to provide aid will let the new regime off the hook, so to speak, and allow them to replace Assads reign of terror with their own. (See: Afghanistan).
However I suspect we're going to see are renewed cycle of aid, oppression, refugees and all that entails. Which is all more grist to the mills of the right wing agitators in the allegedly civilised west.