Crazy to me that anyone would pick Karlson ahead of Pietrangelo. Winning the Cup is the whole point of this game and Pietrangelo did it twice to Karlson's zero. And it's not just numbers of cups. Karlsson had long playoff runs only twice in his career. Once in Ottawa, in his best season of his career, the only season I could see an argument for wanting Karlsson ahead of Pie. Then in his first season in San Jose, which was still a good team then.
In terms of making his team better, he arguably did it for most of his Ottawa years, although there was still not much playoff success for them.
Since then, San Jose had the same record before Karlsson to the year he came on board. Then the wagon fell off, which isn't his fault necessarily, but he didn't make them better either. His 100 point season, you can decide to view as you wish. To me, it was a joke of a season for a player who didn't take his team and responsibilities seriously. And San Jose was so bad this season, it would be hard to argue his 100 point season made his team any better. This year Pittsburgh was even worse than last year without him. For a guy you need to pay assets to get, he certainly doesn't improve your team much.