Margot is elite defensively in CF though, even if he's average offensively he'll wind up like Inciarte. Kimbrel also had a year less of control when moved by the Padres, they without question got more talent in return considering that. Regardless of trying to make comparisons and argue semantics, moving BJ in the deal wound up being a mistake because it lost us potential talent in return. And the only gain we got was saving money in two years we aren't competing for squat anyway.
Even conceding that the Padres got more in return, you can't just assume we could have. The Red Sox FO was different by the time the Padres traded him, and their previous regime was nowhere near as willing to give up young talent. So the Red Sox almost certainly wouldn't have given us a similar package, it would have had to be somebody else. And I'm just not sure we could have done it. Maybe we could have, but I am totally fine with the return we got, as was essentially everyone at the time we made the deal. I'm not that interested in comparing our good deal with another that I might consider even better. I like the deal we made.