Trade him.
Look for a guy who is his opposite. A guy who is great defensively, makes the smart play, and can be a solid guy on the PK.
I could care less if the guy averages like 25 points a year, just get someone who knows how to be a defense first d-man,
Reilly - (Defense first D)
Muzzin - Holl
Dermott - Liljgren
PK
Muzzin - Guy
Dermott - Holl
PP
Reilly
Liljgren/Dermott/Muzzin
When your leading/you need a stop
Muzzin - Guy
Id say its similar to Karlsson on Ottawa, he was at his best when he had an smart defensive guy beside him.
Id go as far as saying I have no problem including Barrie+Kappy in the trade, as long as we get a defensive minded winger back.
I.e - Brodin (Left handed who can play the right side) + Hartman/Foligno (both good defensive W's, both can play either wing)
for
Barrie (they can move him for pics, which is what they need) + Kappanen (cost controlled RW, who would be in their top 6) + Bracco (they need talent)
Until Reillt comes back
Brodin - Holl
Muzzi - Liljgren
Sandin - Dermott
Hyman - Matthews - Marner
AJ - Tavares - Nylander
Engval - Kerfoot - Hartman/Foligno
Timashov/Gauthier - Spezza - Moore