It's kind of an under the radar aspect of building this team, but the long-term impact of Lemieux being more of a 20-25/50 point wing, compared to a 15 goal, 35 point could have a substantial impact on the makeup of this team going forward.
I think he's more or less shown that 15 goal/35 point plateau isn't out of the question for him. If he can consistently hit that next level --- an extra 5+ goals, 15+ points, it really does change the dynamic of our more finesse-oriented top two lines.
Now, if he stays on that third line, that's fine too and very useful. But you can definitely see why there's that desire to find out if he can be a bit more.