1) Chiarelli tried to trade Nuge for Larsson. Shero wasn't doing that trade.
2) With Lucic coming in, Hall was made expendable. We can't have that much money wrapped up in left wingers.
3) Do you know for sure of any offers for Nuge? Because Nuge for Dumba or Brodin doesn't help us.
For #1 fair enough. For #2, Milan doesn't make Hall expendable, Hall is on another level. For #3, I'd argue keeping Hall and losing Nuge while getting Brodin instead of Larsson does make EDM better.
You lose a center you don't need rather than a winger you could easily still use, and you get Brodin instead of Larsson which IMO is basically a wash. IMO that would be a much smarter move.
I don't know of any offers, but I find it hard to believe a similar player to Larsson couldn't have been found for RNH rather than having to overpay for him using Hall.
It boils down to this, Hall is the best winger on EDM, RNH is the 3rd best center, or if you want to argue 2nd best.. at best. They could've found a similar D for RNH rather than trading Hall for him.
Hall + Brodin > RNH + Larsson IMO. Like you said though, I'm not sure that offer was even available, but I wouldn't be shocked if it was.