I think a lot of offense from your first line is important, but a truly top heavy team hasn't won the Stanley Cup since last decade (yeah, we can speak that way now). Boston, Chicago and LA all have had deep lineups when going the distance.
I don't think our lineup could possibly be as balanced as it was last year, but I still think we can ice a deep team whether Nash, MSL or Zuccarello stay as RWs or one of them moves to the left. Even though the strength of our forward corps was RW even before acquiring MSL, the reason we were able to be so balanced was the presence of 3 offensively capable centers.
I go back to even strength time on ice distribution. Last year our top 3 centers were Richards, Stepan and Brassard getting 15, 14 and 13 minutes per game respectively. That kind of balance barely exists anywhere else in the league. How did other deep teams do it? We will go back to the 3 notorious depth teams: Boston, Chicago, LA. Boston had 16, 14, 12. Chicago had 15.75, 12.75, 11. LA had 15.5, 14, 12.5.
We don't have the center balance that we did last year. So, the question is, if Miller, Lindberg or Lombardi aren't capable of playing 13 quality even strength minutes per night, are we really going to reduce one of our great RWs ice time because of it? Or would that player be more effective getting the extra minutes on the other wing?
It's a dilemma. My instinct tells me that it'd be more effective to move one of them over, but that isn't to say that the other way couldn't work too.