Orlov was 4th among defense that playoffs. Niskanen and Orpik played more then 3 mins per game. Orlov played 1.5mins per game. This is because Kempny and Djoos were worse. This past playoffs Orlov didn't play pk. We have established that.
Are you seriously suggesting that with Niskanen AND Orpik gone the Caps are good in pk and critical defensive situations because they have Orlov??
Do you think there's something Orpik brings to PK that Orlov doesn't? They're both willing to block shots. Orpik crosschecks everyone in the crease including the goalie so his "defense" there is a mixed bag. The biggest asset he has over Orlov is that if a slapshot breaks his shin he's replaceable, whereas without Orlov the Caps would become sluggish at even strength to the point where it would tire out the lineup.
Ever wonder why old defensemen who become too slow and too unskilled for even strength find a home on the PK? Orpik, Gill, Hainsey, Polak, Scuderi, Russell, Jeff freaking Schultz, you name it. Because that's the easiest position to play for a defenseman unless he's tiny and easily intimidated. Stand in shooting lanes, slap the puck away, try to tie up the attacker but if you don't it's no big deal because hey you're a gritty vet. Don't even need to take a stride half the time. Clearly beyond Orlov's skillset, but hey maybe Deryk Engelland will be available.