Decent start. Need more, JT is a top 10 overall player in the league. Add Sergachev, remove Juulsen for McCarron.

Doing that would be an overpayment in my opinion, but I agree with you that's probably what it would take. I can only imagine the bidding war from all the teams interested, which would be all of them.

Think the trade is good adding Sergachev would totally be overpaying

I agree, I think it's a matter of people looking and saying Sergachev is a stronger prospect and thinking it should be him because of that but in reality: Galchenyuk is a replacement center (younger and shows offensive promise, admittedly a step down at center but that's what happens when you trade away tavares), Juulson is a very good prospect at defense (which means they'll have flexibiility with him in the next 2-3 years, he's not a risk to lose and lets them build for a future team), 1st rounder is more of the same, and Lehkonen has shown promise as a scorer (it's always a question of how they develop, reasonable to say he looks like a 2nd line winger).

How much is enough for an expiring contract that they can't retain (they'd resign him if they could)? To me that's fair value and people only say Sergachev or no deal because it's being done by comparison, Montreal didn't move him (or Juulson) for Duchene and although I do think Tavares is better value it's not gonna happen.