Harrington is mostly satisfied with his career. Sure, some more hardware, especially individual, would have been nice. But he is currently climbing the all-time leaderboards for stats, and has been doing so at above a point per game pace for his career. There's not much you can knock about that. I don't think Harrington would have done anything different really. The playmaker style worked well paired with Seppala's goal scoring build back in the day, and nowadays he's just doing whatever he can to stay helpful to the team. Harrington would maybe like to be a little more impactful at the tail of his career, its always frustrating to not be able to contribute the way you used to. But that's the way things go, and he will continue to do his best and put effort where it is most efficient to and try to help his team out until retirement.