Maybe, but I think another consideration might be that Umberger, who can play some center and kill penalties, is a better fit for the more utility role that might be necessary considering the glut of forwards that Philly has who can fit into the top 6.
I wouldn't be surprised to see Umberger move elsewhere this summer, as he does have the more workable deal, but if they plan on giving Schenn a bigger role next year than Umberger makes more sense on a 3rd line than Hartnell does.