I think that would be good. Not to overplay any line and spread out the offense and create match up problems for opposition. And if we need to stack as an in-game adjustment if we are chasing the game we can do that too.
The only thing is that Leas/Keefe have consistently used Matthews-Marner as a defensive match up against opposition top lines with Marner being really solid defensively; so it would be a change from the past strategy (not that I will complain about it).
I would make one change though. I would swap Knies and Jankrok in the line up. Holmberg would need as much help at "C" and having Jankrok and Marner flank him would help him especially in the playoffs.
IMO Knies and Tavares have shown some chemistry so that would be good (remember the OT goal from Tampa series
).