Catalyst is awesome. Definitely don't want to want that taken away. I am more than happy to have them add on to it though. The catalyst re aims your reticle at the enemy head every time you take damage. It is amazing for lots of weak targets, like in blind well and stuff. But the weapon needs some love. Cerberus and Outbreak Prime outshine it.

It just needs to be able to spin up on ADS so it starts firing at full tilt immediately. It already has a really fast ttk and decent range. Thats the only change id recommend.