Horvat being missed at the bumper is the real issue. When they let him walk, the PP was shaken. And so, now they could move Pettersson to the bumper and Lindholm to the right wall, as you suggest, or move Boeser to the right wall, Pettersson to the bumper and Lindholm to the net front. Either way, that bumper, net front and right wall rotation has to change.
As to the line-up, I think Tocchet first has to decide if Hoglander-Pettersson-Boeser can work. If it can, then the Lotto Line may not be required.
I like this line-up for the time being:
Hoglander-Pettersson-Boeser
Suter-Miller-Podkolzin
Joshua-Blueger-Garland
Mikheyev-Lindholm-Lafferty
It's a little different than what
@just22 posted, but it's about giving Pettersson no excuse for linemates or position (C). He knows he still has to do the heavy lifting for that line and so his game doesn't change as it does on the Lotto Line. Nor is he playing wing, like he does on the Lotto Line.
Give him the tools and it's sink or swim.