Outside of Garvin we have no one that can rush the passer. We hope Rousseau is that guy but even if Hill is a 2nd/3rd and long specialist that will be a huge impact.
DE depth is a major concern with only Garvin as a proven guy and Patchan/Rousseau/Joyner behind him. Getting (or at least going all out) for Hill would seem like the best avenue right now.