For me, this makes me feel like all is well. My Fire/Axe Tanker only has two procs in it though. Not sure how often the Lethal Procs on Live, but the Knockdown I don't recall ever feeling like it procc'ed more than once. Brute has two as well, but it's the Purple Damage and a Lethal Proc.
As long as it still works as a ST attack, all good for me. I know it's still a good AOE attack even if it's not as good as it may have been, but that seems to maybe have been an issue with how they proc (whether it's bug or feature, not going to worry).
I just hope the buffs help the Fire Armor Scrappers, in terms of survival, noticably.