Kakko is exceptional with the puck. He is currently developing off the puck. The bumper is an “off the puck” role. Protecting the puck is the exact opposite of the bumper role on the power play.
If we’re moving someone off PP1, it would be Kakko in for Panarin to the left wall on PP2. This would be to create balance, it would not improve PP1.
Not only is that not going to happen, but I’d overwhelmingly prefer Panarin on the PP1 right wall to any of the kids. He’s that much better, even on his off hand.
Panarin is smart enough to play bumper well, but that would remove him as a playmaker. With all the hate he gets, he’s still a top 5 forward in PP assists league wide. You can’t take him off the wall.
Kakko is where he should be. PP2 just needs more ice time.