Well it'll either be due to injury or Knob and Coffee getting tired of watching Ceci and/or Vinny get beat like rented mules by a speedy forecheck.
Personally I think Stecher gets into the lineup next game and just runs with it; And then the discourse around the team for the next few weeks will be: "Ah! Nurse is so much better when he's paired with speed and someone that can actually handle the puck and not treat it like a grenade. Who would have guessed?"
So how do you get to Broberg-Stecher? My guess: If Broberg gets in, I can see the team being hesitant to have one of their lesser defencemen playing their offside without proper insolation. Thus Stecher drops to the 3rd pairing, so both guys can play their natural side, and then Nurse is tasked to play his offside or look after someone doing so.
Basically, it goes through this line of questioning...
Do I like Kulak looking after Broberg playing his offside? Ehhh.
Do I like Broberg looking after Kulak on his offside? Ehhh, but worse.
Do I like Nurse looking after Kulak playing his offside? Better.
Do I like Kulak looking after Nurse on his offside? I can actually see this one working.