From my view point, he hasn't been as effective since his plantar fasciitis last year. But he is still far better than anything we could draft to replace him.
And he still has the athletic ability to be as good as he wants to be.
Trade bait?
Maybe, but This guy is a team leader and beloved by his teammates and coaches.
If he takes a cut to stay with the Vikings, I suspect they will give him a nice bonus and another year or two of guarantees.
And I wouldn't be surprised to see him as one of the leaders in pressures and sacks once again.