I think the discussion has become is Okafor "better" than Munroe, which we will not be able to definitively answer until Okafor is 26. His current skillset and his age definitely projects him to be a better prospect... but for the Celtics the question is "Can he be a building block" and most persons even those for the trade say "NO".
So if we all seem to agree he is temporary, why not acquire the "cheaper" of the two in Munroe, use the Nets pick to draft a better big or even make a play for Noel next offseason. I'm intrigued by both Smart and Rozier at this point for our long-term and giving up either for Okafor doesn't feel right at the moment