Some of the alleged counters to me are unlikely IMO.
Russia is not going to give away $300Bn in frozen funds. They wouldn't accept some piece meal slow walk on sanctions removal either i don't think.
Russia also isn't going to agree to an article-5 style military alliance for Ukraine, whether its formally in NATO or not. Nor are they going to approve of unlimited / unrestricted military buildup in Ukraine by NATO countries.
What kind of agreement would it be from Russia's POV? They end the war that was made to thwart NATO expansion on their doorstep, and then we give them a "article 5-like agreement" and "no restrictions on the presence, weapons and operations of friendly foreign forces on the territory of Ukraine."
Russia is fine with Ukraine being in the EU economically and deepening its ties, but there's no realistic peace deal if Ukraine isn't demilitarized and neutral. Why should Russia stop fighting otherwise?
I think everything else is just minutiae that wouldn't hold it up. Russia doesn't really care about control of the ZNPP or EU economic agreements with Ukraine or non-hostile ceasefire monitoring. They do not need the west's approval to control Crimea or the DPR/LPR, we aren't giving away territory, they already took it and we have no say. They might even be willing to overlook the theft of their assets in the west, its just bean counting and swapped for other fungible assets. They might even accept western "security guarantees" for Ukraine if they are the kinds of vague EU bureaucratic empty promises instead of NATO troops setting up missile batteries in Kyiv.
I just don't see any way in which this proposal works as written, all the rest is irrelevant the sticking point is Zelensky's demand that Ukraine be built up as a military threat to Russia and Russia's demand that Ukraine not be a threat and the part where Ukraine is obviously losing the war to decide that very issue. If we won't recognize it, Russia has a very simple plan: Win.