While I'm a big fan of the new 2nd line with Marner, I wish people would remember that the Naz/Leo duo was lights out last year, as well as during the beginning of this season (before Kadri's slump). Yes, it's good that we're not going back, as the current iteration is an upgrade and a consistent threat, but it's not like the previous line was ****ty - They went through a rough patch, that unfortunately lasted 1/4 of a season, but they were also quite good at shutting down other teams' top players, and it allowed the Marner/JVR/Bozak line to provide sheltered scoring.
Not nearly as good as what we have now, but they weren't nearly as bad as they were made out to be around here, either. There were nights where they were our most dangerous line offensively, generating more chances than anyone else on the ice, but simply couldn't convert. It was frustrating, but if you were watching the games, it was easy to see that Kadri was simply snake-bitten.