"[Last year] was a lot of ups and downs," L'Heureux said. "I think that was kind of the story of my junior career. But I thought I really was able to focus on myself, focus on becoming a pro, being able to come to these dev camps and rookie camps and seeing how those guys that play in the National League really just come to the rink every day and put in work. So I really want to implement that in my off-ice training, my on-ice training, everything. I've been focusing a lot on that in the last year, and hopefully it translates to the next level."