Yeah. If he had had any credibility, Ukraine might have traded its eastern provinces and crimea for something .... cheap gas and debt foregiveness?
Nato membership was not forseeable, but with sound economic fundamentals and less corruption, EU membership wasn't impossible.
BUT would Putin have accepted EU membership? IMO, no friggin chance. He wanted Ukraine exclusively in his "former soviet" trading bloc.
A demiliterized Ukraine? When someone's invaded you twice in 6 years, disarmament may not seem a good idea.
IF PUTIN had been willing to allow Ukraine to exist in peace and free trade, then a deal was not that hard to see. And no doubt Ukraine would love a deal now ... but how to you make a deal with a guy who should be in jail for crimes against humanity? Say he does a deal and invades again. Would the same sanctions happen? I wouldn't bet on it.
So I just don't see the deal. And Putin would be giving away "cards" if he let the civilians leave war zones.