A general question- even if Robertson stays- and you make another run next season- you ideally are not retaining Duchene, Marchment, or Dadonov. Benn can fill in for the third line or something but clearly isn’t a top 6 player anymore. Who is scoring goals next season? The free agent class blows- Sam Bennett, maybe? Can you afford him? Marchand?
Ignore lines, etc. just a general head count:
Robertson - Hintz - Seguin
Rantanen - Johnston - Granlund
Steel - Bourque - Hyr.
Benn - Back - Blackwell
Granlund takes 3x6.5 if he’s feeling generous- which is also not a guarantee, or that he will resign at all.
But if you tell me you’re trading Robertson for a defenseman with no guarantees going into free agency- you’re almost certainly resigning Duchene with no guarantee he takes another pay cut. Maybe even holding onto Marchment if things don’t go well.