The title is really all there is to it, previously no one really thought about Proton Rockets on anything without 3 agility. A four dice attack at range one once mostly wasn't worth the three extra points. However, with the inclusion of the free Guidance Chips in the nearly always open mod slot, is this now reasonable?
Zs seem to be in a good place right now because if they have a focus they have only a 14% chance of dying to a 4 hit attack, and 4 hit attacks are becoming more and more common. If something else is targeted (or they hit the 60% chance of not needing to use the focus on defense) they can return fire with a very solid chance on a four hit attack back.
I'm having a bit of trouble on the math for the chances of four hits with Guidance Chips, my fraction multiplication breaks down with converting results.