Ken Holland at his season ending availability spoke long and ramblingly about the need for "Greybeards".
I suppose Keith fits that mould, and Edmonton does have a need at LD with most reports having Klefbom done for the career, but at his age and with that contract I definitely wouldn't give up much in the way of value for Keith.
This is why Edmonton having capspace isn't necessarily a good thing, we're never guaranteed to use it intelligently.
It also doesn't make much sense for us pre-expansion since we're going 7-3-1 and the 3 being Nurse/Bear/Larsson, assuming he gets extended before the draft.