IMO the new answer is depth. More than ever. Whether it's up front, on D, in goal, or all of, or a combination of these things.
For example, Florida is deeper than Toronto. Everywhere.
For example, Seattle won last night 7-2 and had goals from 7 different players.
For example, Carolina are making hay without Svechnikov or Pacioretty and are getting some sort of production from basically everyone.
Oilers are a freaky outlier and if they lose it will be because they aren't deep enough.