Hes still their undeniable number one defenseman. Still putting up points. Protects the younger guys. He has invaluable experience he can pass on to their younger players as they rebuild.
He and price are their sedins. They mat have bloated contracts but are in no dire need to shed them. What they'll do for the rebuild is more valuable than the cap space they would free up if traded.
Oh yeah
And he's their captain.