Draven is not broken because of DD, stop spreading that myth.
He has similar or even higher win rates by rushing BT or going the IE/Shiv build.
He can even rush ghostblade, he legit can build anything and 1 shot you while being a semi tank due to overtuned support items + lifesteal, but lifesteal is not a issue by itself, it just looks broken here because hes unburstable with supports giving him 3 health bars and when you remove the natural counter to lifesteal which is CC + burst then of course its going to be a problem.
Its a Draven problem, he needs nerfs (+ the support items).