I don't buy for a second that Toews doesn't work his ass off. But injuries, especially head injuries, linger and take a step off both physically and psychologically. I'm sure he's frustrated with his level of play and where the organization is at and is going, and his participation in three Cups has more than earned him the right to make mild complaints at the very least. As for what his trade value is, I have no freaking clue whatsoever.
Regarding Keith, I think he just tapped his longterm reserves too deeply in 2015 and was never able to recover.