Yet they still have 60 points.
It's almost as if they make the right moves to improve the team 5v5, they could actually be really good!
I have an extremely hard time believing that's possible. The 5v5 issues are too deep rooted.
Panarin and Zibanejad are being opportunistic but aren't driving play. Kreider never drives play, he just parks it in front and deflects shots in, which has to come from other players' possession of the puck. Laf and Kakko and Chytil have not arrived yet. Bottom end players like Goodrow, Rooney, etc, just don't generate enough offense and never will.
I don't think adding a Hertl into the lineup and a Gauthier out of the lineup changes nearly enough. You still have all the same problems.
What you need is the maturation of 3-4 of your young stars into offensive possession and shot generators (Kakko, Laf, Chytil, maybe Kravtsov) and the arrival of plus players from your system (Barron, Panjuniemi, etc) to fill out the bottom and replace the black holes down there.
It is at that point that adding an icing on the cake piece becomes attractive.
Until then the team is going to have the same problems. Hertl isn't going to have the impact people think; he's way more likely to get lost in the wash.