As I said in the GDT, Sullivan has a real problem:
He thinks the Pens have their best chance to win with Jake-Sid-Rust.
The Pens are the type of team they need to be in the playoffs (if they make it) if you get the Geno you get with Jake and Rust.
I think we all know what Sullivan is going to do, but there's a legit argument that it's worth seeing how they look with Sid centering McCann and Kapanen and leaving GMR intact as opposed to reverting to the opposite.
EDIT: Ideally, Hextall could help resolve this with a move, which is what Shero did in 2008 when Geno killed it with the guys who had been 'Sid's wingers'. He's not going to get a Hossa, but with a LD to move, he's certainly got options.