Maybe substitute McQuaid/K. Miller for the secondary prospect?
Could be a possibility. I have to wonder though, what's the Bruins prerogative to come out and say Carlo is untouchable yet include him in a trade with Colorado anyways? I feel like the only reason the Bruins stated he was untouchable was because other teams called Sweeney and asked him about Carlo after the news broke out that Colorado wanted Carlo for Landeskog.
If Dater's right about Colorado only making a deal if Carlo or McAvoy is in the deal, my guess, and it hurts, if the Bruins and Avalanche are still talking, it's probably McAvoy going the other way.
I mentioned earlier in the season a potential McAvoy + Spooner + McQuaid deal for Trouba when Trouba had not signed with the Jets yet. In my opinion, it made sense at the time because the Bruins had Carlo who was proving he can play at the NHL level, and adding Trouba who the Bruins would view as a 1st-pairing defenseman in return would give them the opportunity to compete now rather than waiting an extra year for McAvoy. Sure you may give up a future 1st-pairing defenseman, but the Bruins would have got in return a 1st-pairing defenseman that could play right now.
Coming back to the present, this team still wants to compete with the current core in tact. We've heard rumors about the Bruins targeting Landeskog, a player who would help the Bruins offensively who is also a two-way player and is only 24. This deal will not only get the Bruins a young top 6 LW, it could also net them a top 4 defenseman to get McQuaid out of the top 4. Barrie is only 25 and adds more offense to their offensively-lacking defense. You won't be getting a top pairing defenseman in return for McAvoy, but if he is the main piece, you'll be getting a young top 6 LW and a young top 4 D which would fill two major holes on this Bruins team. Looking at the lineup after a possible trade:
Marchand - Bergeron - Pastrnak/Backes
Landeskog - Krejci - Backes/Pastrnak
Chara - Barrie
Krug - Carlo
I could see why the Bruins would consider doing such a deal. I personally would rather wait it out and see McAvoy and Carlo manning the Bruins' defense for many years to come. However, with ownership wanting this team to make the playoffs and them potentially breathing down Sweeney's neck to do so, I could see a trade like this happening.