I'm going to jump right on in here and say it; the 3 degrees of jitter isn't actually all that terrible.
The problem is, it's terrible in comparison to other weapons. Allow me to explain as best as I can, using my favorite thing ever, math!
So, if we assume you like to engage your targets at...
After quite some testing with Inertial impact burstos on both my Python and Eagle, I really can't find any use for it. It drops off your real DPS by around 90-99% if you're over 300 meters away. Even when latching my nose to the butt of an FDL with my ImpEagle, it just won't get useful and only...