I know you never liked the trade. But, that doesn't mean Danny regrets it. I think having 1 of the Oneals healthy fits right into his plans (and currently JO looks good), and I think he is still very happy with the value of the trade for the future of the franchise.
I guess to each their own, but I think if you told Danny that Shaq's health would be this questionable, and that Perk would be healthy, that there's no way he'd pull the trigger. You may be confident in a JO / Krstic combo as the center rotation for a championship team, but I just don't think most people would (and I predict that that includes Danny.)
And no, I never liked the trade, but if this team was rolling right now, with a healthy Shaq and a contributing Green as the sixth man, I'm pretty sure I could say "Yeah, this trade looks like it's going to work out". However, I think a lot of people are probably vested in their opinions at this point, so I'm guessing very few will admit that they'd change their opinions -- or that Danny would change his -- at this point.