I don’t see how your suggestion solves the problem at all… Maybe, that’s a start…
Putin made clear multiple times that we wants the whole Ukraine. Serious question to you: How do we pretend this from happening?
The only way for a stable peace that I can imagine is: The remaining area of Ukraine gets full protection by NATO. Otherwise, Putin will try it again.
Dammit, don’t ruin it!!11 The “of” is silent 😉