Theres nowhere to put him until someone gets hurt.
As far as switching up Pageau and Barzal, it’s about getting Barzal, Lee and Bailey going. Parise-Barzal- Wahlstrom makes perfect sense to me - a guy that creates a ton of space for other players, a guy that can snipe from anywhere when given space, and a tenacious forecheck to make sure they have the puck as much as possible. But you’re right, nothing wrong with that third line either. Just seems like Lee (too slow, doesn’t shoot well) and Bailey (pass first mentality) don’t make sense qs linemates for Barzal.