I'd say this makes B.Schenn expendable.
I don't think this was done with trading Schenn in mind. Schenn is younger and his PPG has slowly increased every season. He finally found a niche at RW as well. We will regret trading him just because we acquired Sam Gagner, who may or may not be here beyond this upcoming season (UFA next summer).
I do think this signifies that Lecavalier will not be here after his $2 millon bonus. It's also insurance in case Read doesn't bounce back from last years dismal season. You can't have too much depth. My guess at lines for next season based on Gagner being here, White re-signed and Lecavalier gone:
Line 1: Raffl-Giroux-Voracek (I still like Raffl here because of his board work)
Line 2: Gagner-Couturier-Schenn
Line 3: Read-Laughton-Simmonds
Line 4: White-Bellemare-VandeVelde
Umberger healthy scratch
That's a much better 3rd line than the last 2 seasons, that's for sure. Can try Gagner with Laughton and Simmonds too. Lots of options.
Other possibility:
Line 1: Raffl-Giroux-Voracek
Line 2: Read-Couturier-Schenn
Line 3: Umberger-Gagner-Simmonds
Line 4: White-Bellemare-VandeVelde
I prefer option 1