Maybe I don't watch enough Montreal games, but don't Ovechkin and Subban play similar power-play roles? Care to elucidate for me? Not sure what team they play for has to do with it. The Caps are lousy (all Ovechkin's fault I know).
Both powerplays are centered around these two players, but they play very different roles.
And they don't play the same position either.
Ovechkin plays a lot higher than Subban, often closer to the boards as well. From what I've seen, the Caps often (to not say always) go for the cross-ice pass, forcing the goalie to go from post-to-post, and constantly set-up Ovechkin for the one-timer. He'll only rarely walk into the slot for a wrist shot. The Caps Ovechkin-centered is very similar to the Bolts Stamkos-centered set-up. The fact there has to be quite a bit of puck movement for Ovechkin to take his slapper often leads to open shooting lans
Subban plays a lot lower, and has a lot more conventional point role. People have adapted from last season and put a lot more pressure on him at the point, which explains why his PPP/PPG totals have plummeted. Therrien has yet to adapt his strategy, and we get to watch on a game-to-game basis Subban being fed the puck when he has absolutely no room to take the shot, and when he does, the shooting-lane is non existent. The Habs PP is broken, and will stay that way as long as they don't shake things up a bit. They have very little firepower on the wings to take away the attention that's on PK, Pacioretty being the only one that's able to legit beat a goalie with a shot.
PK has very few PP goals because he doesn't have the opportunity to shoot as much - and to get quality shots - as he did before. He's down at 2,576 shots per game and 5,3 SH% from 3 shots per game and 8,7 SH%, last season.
As for the "it's always Ovechkin's fault", you must have failed to get the point I was making, because that clearly wasn't what I was getting at. Babcock had one of the best trigger man available, and he decided to sit him to play Hamhuis and use Sharp on the PP. Thus, having Ovechkin has a 7th makes 0 sense.
Having him on Crosby's wing and having him play a similar role to what he plays on the Caps' PP, however, would have had its merits.