it does however as you just pointed out cut burst by about 40%
And DD does give you the ability to sustain through the dot
As do shields which help negate said damage and other forms of healing
Basically the item makes you die 30% slower giving you more time to counter the damage through shields heals lifesteal and shit like athene heals censer heals and stoneborn pact heals
Shit will get really funny if you stack a knightsvow on top
I already use DD on tanks/juggernauts who can make use of the AD
You tack on a Titanic hydra to heal for about 5% hp per basic attack while the damage conversion keeps you alive long enough to amke use of that healing
It's pretty strong