I think the main issue is the system. Everybody talks about how hard the Carolina system is for players. I think Rantanen took one look at that system and was like, "nah, I'm good."
It is a structured, calculated system that yields great results despite holes in the lineup, questionable goaltending and a lack of elite talent. But come playoff time, you need elite talent. And if your preference is lineup balance, your players cannot be spent by the time you reach the playoffs.
I remember vividly watching last year's Carolina-NYR series. The Rangers were completely dead in the water. They were one period away from being done for the season. And then suddenly, they dominated the third period and won the game and series going away. Carolina looked gassed.
If they choose to continue down this path, they are wise to continue to target the Logan Stankoven's of this world. You need young legs to play that system, and young legs are cheap legs too, which Tom Dundon wants.
That said, there was talk pre-deadline that they were discussing a contract extension with Taylor Hall. Which for me is a head-scratcher, and I love Taylor Hall.