As much as I hate Sullivan and want to agree out of spite for him, I'm not sure that's entirely true. Yager likes to shoot and Crosby wants the puck, yes, but Crosby also likes making plays. He lost his trigger man in Jake so tell Yager "Hey, work with Sid and shoot what he gives you." wouldn't be the worst direction.
Starting Yager at wing to work him into the NHL and then transitioning him to center when appropriate isn't the worst option. That's the Jordan Staal route and it worked out well. Granted, the team's makeup was slightly different but still.
Yager-Sid-Rust
Bunting-Malkin-Rakell
DOC-Hayes-Beauvillier
Poulin-Lizotte-Puljujarvi
Would be my "preferred" lineup assuming two things: 1. Hayes is a part of the roster. 2. The "new" guys are prioritized over the "old" guys. Meaning, if push comes to shove, Acciari is a HS over Lizotte.