I can get behind this, but I think the one problem with this is that I'm not sure that Zucker-Whoever is a good enough winger duo for Crosby. I think Guentzel-Whoever is good enough, but that's because Guentzel is an elite player. I think you need to acquire at least another 2nd/3rd line tweener if you run with Guentzel-Malkin-Rust, but if you run with Zucker-Malkin-Rust (or Zucker-Crosby-Rust), you can get away with Guentzel-Crosby-Whoever (or Guentzel-Malkin-Whoever).
Either way, they have 3 legit top-6 wingers signed for at least 2 years beyond this year, and I'd argue that they're all 1st line guys if they continue to perform like they have. It's a great problem to have.