Interesting question. If I was swapping places with a non-contending team, I would want them to have a more promising handful of rising young players than ours. Thus I would not swap with Brooklyn, Charlotte, Dallas, or Phoenix. I'm on the fence about the Knicks but I'm leaning no because I think Porzingis is going to get broken and Anthony's trade value is falling too fast. Damian Lillard is really good, but I think I would probably take a pass on swapping with Portland as well.
Charlotte has MKG, Batum, Walker, Jefferson, Lamb, Zeller, Kaminsky. Now not all those guys are young per se, but I think that is probably a better starting point than Boston. Phoenix has Knight, Bledsoe, Len, Tucker, Morris, Warren plus the vet Chandler. Again I think that is a bit better starting point. As for the Knicks, whether Anthony is fading fast, he is still by far the best player on either team and Porzingis is as at least as good a prospect as Smart. Guys like Lopez, Afflalo, Calderon just add depth and are fairly similar to Boston's players.
Dallas and Brooklyn really are the only debateable ones in my eyes. Neither has any high end prospects, but both do probably have the best player on either team (though not clear franchise player type players).
I mean it is your opinion and all, but it's tough to see you as anything more than a pessimist if you think Dallas and Brooklyn are
still debatable. There is no reason to want either one of those rosters on a full swap. Contracts, player's age, injury concerns, etc. Both teams are in a situation that no one wants to be in. At least Dallas has most of their draft picks. Lopez doesn't even play defense at the position where it is actually super important to play defense. At this point, considering age, production, overall impact, and positional need, I'll take IT over Lopez. Dirk is still awesome, but I'd probably take IT over him just because of age. Dirk could be done by the end of this year or next season for all we know.
Other than those two, I could see the argument for wanting a bunch of other team's rosters. I could make an argument against half of them, but I could see why still.
It's interesting to see you list players like Jefferson, Lamb, Batum, and Zeller as to why Charlotte is in a superior position to us. Those players are not that good, and most Charlotte fans are dying to see Jefferson traded off the team. They are no better than our role player collection of Bradley, Zeller, Sullinger, Olynyk, and Crowder. The only thing Charlotte has of truth worth is Walker and MKG. Those are two nice players right there, but we have IT and Smart who are pretty similar if not better. I think Mickey, Rozier, and Hunter all have potential to be better than FK, which is kinda funny considering Jordan denied a trade to get most of those draft picks just to pick FK. We are probably more likely to hit on one of our three picks than Charlotte is to hit on FK. So meh to them. I'll keep our roster pretty easily honestly.
Phoenix has Knight and Bledsoe, but again..we have Smart and IT who are just as good if not better. I have some doubts about Knight and Bledsoe working well together also. Neither one can run an offense at all, and they are both even more trigger happy than IT. Knight was one of the worst offenders of dribbling the clock out for his own shot last season. Good talent between those two, but I'm unsure the fit is right. The rest of their roster is pretty much the same as ours potential wise. There is nothing special about Tucker, Morris (who will probably be traded for nothing after his uproar), Len, or Warren relative to guys like Bradley, Zeller, Sullinger, KO, etc. At this point Chandler is no better than Amir. It's a wash to me. What keeps the Celtics over the edge is their 2015 draft selections. Rozier, Hunter, and Mickey is the best I've felt about an overall draft since 2004. I want to see how they develop. With the combo of IT + Smart, Amir, and our 2015 draft selections, I feel pretty comfortable keeping our roster over about 12-15 teams.
New York...Lopez is nice. I think Melo is underrated nowadays, and Porzingis looks good. I could see the argument there, but the rest of the roster is pretty junky. I would consider them, though, because those three players would be a good starting point. Really depends on how much longer I feel Carmelo has left. Lopez and Porzingis aren't enough alone to make me want to swap rosters.
I don't mean to sound offensive or anything, but I feel like you are the ultimate "grass is greener on the other side" kinda person, lol. Think the worst of our guys, but the best of others.