Eriksson Ek right now reminds me of Koivu a decade ago, though JEE took longer to get to that level. When Koivu started scoring a bunch everyone was sure he was our #1 center, and was being held back by his linemates. Two years later we got Havlat to help him out, and then Parise, and then everyone was saying he should be the #2 center. Also just like JEE, Koivu didn't have chemistry with the best wingers on the team. He did his best offensive work with middling offensive players on his line. Maybe that was a timing issue with where he was in his career arc, or maybe it was his style.
I think there's some truth to JEE being a #1 center, but he should be our #2 center if we want to win a Cup. It isn't a linemate issue, it's a we don't have two really good centers issue. That's why they should probably consider elevating Rossi in the lineup sooner than later, but with our defense corps, I'm not sure this is the year even if Rossi works out.