Muzzin-Holl may arguably be the best shut-down pair we've ever had in the past 10+ years.
Rielly-Barrie may arguably be the best offensive pair we've ever had in the past 10+ years.
Dermott-Ceci may arguably be the best 3rd-pair we've ever had in the past 10+ years.
I think the biggest issue is being comfortable with Keefe's system. IMO it's a fantastic system, but trying to have consistent possession of the puck does have it's disadvantages and we saw it today with the many turnovers by Rielly and Holl.
We just have to play to our strengths of strong offensive play. When we take a commanding lead, Keefe has to tell his defence that it's okay to dump the puck out rather than force possession play.