Fusions were a favorite for me when Vanilla was around and I had the old 77 Wizard with Armor Piercing Rounds which actually DID over-penetrate targets and kill things behind your primary target. That Wizard wrecked praetorians. I quit using them when the fusion rifle nerfs hit. I know they buffed them, but they're not plug and play weapons like they used to be. There is now a pretty big learning curve with them and you need to spend time with just a single FR of your choosing so you get a feel for it. I don't really want to invest that kind of time in the weapon, especially since I've always preferred sniping, ever since I got my Patience/Time back in Y1. Bottom line: I see FR's as an extremely powerful weapon in the right hands, similar to a HC. However, the learning curve is so big that most people don't want to invest the time or effort to practice using one in order to really maximize their potential.