I think the solution is to break it up. The Western part of the Ukraine (L’viv) should be independent and eligible for NATO, if they so desire. The center, which is based in Kiev, would be neutral, neither NATO nor Russia can base troops there, and the Eastern provinces either absorbed into Russia or become a Russian puppet state. I think that’s a natural division, and I believe even Putin stated he would be ok with it.
Well its not like the last time a country was divided by the Russians caused any problems.
Soviet And Nazi Soldiers Talking After The Successful Invasion Of Poland
Eastern Ukraine is gone. So is Crimea. But they aren’t going to split up the country any more if they can help it. And it doesn’t really solve the problem, as Putin and NATO will struggle to get control of the central section.