Either complete total disaster, or concessions on both ends. Never saw a war completely put to bed with one side completely humiliated. We all did that to Germany after WW1. It doesn't work.
The thing is, had Russia not gone worse that ISIS and Al Qaeda there might have been some political wiggle for them to get out.
Now, not only do I want Ukraine to get every inch of territory back, I WANT them humiliated, maybe they'll respond only to what they know best, utterly disgusting violence. Maybe that's the only concessionary way.
I assume somewhere in the future, we'll all have to deal with this issue. Evil doesn't just goes away with a push. So it might be possible that the ramifications of this will be felt 50 years from now. Eventually I feel, either we burn these fuckers down now/close future, or deal with them like a re-occurring cancer. Both very painful, very costly directions. Which is why I think, some concessions will have to be made when spirits are not as heated.