Finally got Rage Burst - and immediately got my Heavy killed because it doesn’t work the way it used to. She stepped out in front of a cluster of 5 Crabbies, ready to mow them all down… and found she couldn’t sweep her weapon across them all. I Rage Quit and Restarted - which I very rarely do.
Personally, I think it was much better when it was limited to HMGs and you could set a start point and an endpoint to sweep the gun across. This is how Rage Burst should be: a sweep of automatic fire across the field that can take out multiple enemies - and if you want to focus on just one target, you set your start and end points in the same (or very close) spaces.
Limit it to Auto-weapons and make single shot weapons unable to use it. Then it truly represents something that is present on the battlefield today.