Do we essentially call for unconditional surrender (of all of Putin's goals) or are we willing to offer a fig leaf? More importantly, can we and Zelensky remain united--there's no guarantee that he will see things the same way we do. Are we willing to fight on until the last Ukrainian fighter is killed? Is he?
Part of the problem I didn't make clear in my comment is we've got multiple decision makers-- Zelensky on the one hand and the "West" as represented by Biden on the other. (And that's oversimplifying--while NATO and the EU and the rest of Europe seem united now, that's not necessarily the case in the futre.)
I think we can predict that our high regard for Zelensky today will fade as we and he come to realize we have different priorities and aims.