This is intentional. From the patch notes for Destiny 2 Update 6.2.0: [quote]Glaive melee attacks can now activate the Exotic armor perks on ACD/0 Feedback Fence, Karnstein Armlets, and Necrotic Grip.[/quote] (΄◉◞౪◟◉｀)

And karnstein Armless, basically free health

Yeah I tried its not that great. It's been tuned down alot. It doesn't spread as much. I ended up putting getaway artist instead, was quit disappointed really as I was looking forward to it.