Don't want to go "all in" this year, but a few more key moves could go a long way.
Team is set up for the long term with Fehr shifting back to C next season and Sundqvist joining the big club. Rust, Foligno, Simon, and Sprong/Sheary/Wilson will be your bottom 6 wings.
Could stand one more bottom 6 rental to demote Porter; but it seems Porter is bound to be in the lineup this year.
D is also set. If Franson falters Lovejoy steps right back in.
Buffalo gets forward depth and balanced D pairs. Salary difference is negligible. Terms are pretty balanced. Bonino and Franson have 2 year deals, Bennett and Foligno are both RFAs and similar in age. Pens get better talent I think but give up what I feel is equal amount in depth.