I'd rather DeBrincat over Nylander. I think the ask from Toronto would be way too high, and I have not liked Nylander's attitude since he held out against the Leafs. I have strong doubts about his cultural fit, which matters.
I hope GMBM is not as damn eager to give away our potential forward talant as some posters here want to do. I'd be OK with giving Kuzy first and foremost - would probably have to be done by getting futures from a team he is willing to go to - or having him be willing to go to Ottawa.
Other than that, I would craft a deal with our 1st next year protected. It seems Miro might be developing faster than many expected, and same with Suzy. I suspect Leonard may be able to get here sooner than many expect.
To move CMM/Protas or Lappy now, before they have had a chance to show when they can do at their natural positions in the NHL under a youth friendly coach (who knows these young players well) is bad asset management. Caps need a year with the young guns under Carberry to make good judgments on long term plans.