Well, Buffalo isnt doing that

Why is that? Because of Organization Depth or because of return? STL's 1st rd pick will likely end up in the 17-25 range and they already have 3 first round picks. I feel that Buffalo could use the addition Offensive Defensemen, even if they just flip him for another first at following years Trade Deadline. Regradless I am sure some team would be willing to take that trade whether it be Buffalo or not.

Sabres have way to many LD and Botterill is too stingy with his 1sts

Buffalo probably says no. As for Ottawa, Dorion probably throws his phone at the wall after hearing that offer

I would imagine Dorion is throwing his phone at the wall with every offer, knowing they aren't going to field a competitive team for at least 3 years. How many teams are willing to give up two B+ prospects, a first, and a second that has a decent chance at least a decent of being a first for a player that may not even resign? There are what maybe 5 teams in a position to make a trade like that? Ottawa just have to prey they get a better offer, but I don't think its a guarantee they do? Right now I would say Winnipeg is the front runner because they have the added benefit of not being in the eastern conference.

The Sens got almost the same value for Duchene, who is nowhere near as good and is older

I am not disagreeing with that. Duchene is also a center which typically increases a players value. I do think you will get a slightly better return which is why I included a "Prospect" already proven to be able to play top six minutes and a guaranteed 2nd round pick. I do think Boston would be willing to do it for any two prospects not named DeBrusk, McAvoy, Studnicka, or Vaakanainen if that suits Ottawa better. I just used the two that I felt filled needs the best.