From a BOS perspective, it's hard to see where you're boosting the offense. If you're taking Krug's points off the backend, then you need to add them to the front end. Toffoli and Heinen had the same production last year and that was a good year for Toffoli. Heinen is down so far this year and so is Toffoli. To me, that's a wash because Heinen's RFA status doesn't reduce Boston's control (offer sheets are rare). Now you have Forbort for Krug and Zboril? I'm okay with softening the backend by trading Krug, but that means Boston's package has bring back a winger who is going to balance those top two lines. A D corps of Z, Mac, Carlo, Moore, Miller and Grz or Vaak is fine if the top two lines are balanced and scoring.