Mews is from Ottawa and its unlikely he'd waive his NMC (its doubtful he was even asked to honestly).
Personally I don't think Ottawa needed to make a Wright-level trade. Hindsight is 20/20 but I'm pleased Boyd didn't acquire Wright. But, some of us on the Ottawa board believe it was irresponsible of Boyd to not at least go out and acquire a good middle-6 forward to (1) help insure the forward group against Boucher's potential season-ending injury (which was known at the time of the deadline); (2) extend the lineup and lessen our reliance on 17-year old forwards; and (3) add a veteran presence, preferably with some size and physicality, to add a missing element to our forward group. There were plenty of players moved at the deadline that fit the bill. Obviously we ended up losing Boucher for the season (he only played 21 games for us this season, 2 after the deadline so not a back-breaker), Barlas (3rd/4th line LW) is week-to-week, and Tolnai (2nd/3rd line C) is in concussion protocol. So now depth at forward is a concern, as a lot of us predicted it would be.
Marrelli could likely have been included in a deal, maybe even with Foster. Those two players + picks could have been used to acquire a really good player + good depth player to fill the gaps described above. There was a lot of talk around the team about Boyd's reluctance to move rosters players at the deadline, which ultimately is what happened. As it stands, we've been consistently dressing 8 D and playing one of them (Sirman) on the 4th line. Rohrer has played out of position at C all season.
So I'd agree with those that argue that we should have acquired more at the deadline. Ottawa is a very good team, but a flawed one. They're vulnerable to a heavy team like Oshawa...I don't believe Oshawa has the horses to take 4 games (no offense at all), but North Bay certainly does. Perhaps Barrie too. Sarnia definitely does. I'm not making excuses, it is what it is. Ottawa's roster construction for playoff hockey is flawed and in a season in which they could have gone into the playoffs as prohibitive favourites after a few sharp moves at the deadline, they'll instead enter a series vs. Peterborough as a slight favourite, then a coin flip series vs. North Bay (or Barrie) or perhaps even a slight underdog. I honestly think Boyd did a disservice to the team by not being more aggressive at the deadline, but that's my perspective and its not my job on the line.