My intention isn't to pile on this, but only the three bolded trades were for rentals. In the other trades, the primary players all have terms left on their contracts.
Sekera's a top-four Dman going to a cup contender that's short two top-four Dmen (Voynov, Martinez).
Vermette was one of the most sought after forwards of the deadline, going to a cup contender crippled by the loss of Patrick Kane.
Cup contender Preds acquired both Franson and Santorelli with their 1st, a prospect, and Olli Jokinen, whom the Leafs didn't want anyways.
I don't think any of the assets Buffalo put on the marketplace met what those teams were looking for.
Generally speaking, I think GMs have figured out the value of deadline deals, and the days of collecting a 1st rounder for a middle-of-the-road rental player are over.