It's like the anti-Kesler trade. It wasn't so much that Calgary had given up on Sven, it's that he somehow ended up in Hartley's doghouse. Then, despite bizarre treatment and random call ups, he put it together for some serious AHL numbers. Then he showed up for camp, and got cut before Gaudreau and Monahan, who are both just bad defensively. Hartley was the reason again.
So yeah, Sven wanted out by that point. It really says it all that he just pulled over and smiled when he got the trade call. He's been through hell.
The carrot of becoming an NHL player is nice, but every player has that to motivate them. The real winners have experienced what it's like to be wasting away on a crap team. Those players make the most of their chances