The Norfleet was made broken by absorbing rockets from it’s blast by equipping a Sham, which lead to the term Shamfleeting being born. This was extremely efficient and quick as a single shot with the Norfleet could clear a whole room of enemies. Now, if you use the ION Cannon too close to yourself, you will almost certainly drop into FFYL. Also, the gun has a long charge up time and a pretty moderate blast radius, what makes it a great gun against single targets, but really slow overall and especially for mobbing. It’s really damn strong and pretty much what a rocket launcher should be, but it is not even close to what the Norfleet was. And that’s a good thing.