Yeah... thats why everyone is changing from DRk or outright avoid doing any serious content with it right ?
Majority of the Players don't care about the small Raiding comunity they just want to enjoy DRKs gameplay and thats realy bad atm mainly for 2 reasons Lack of selfsustain AND overall Boring Rotation.
No dmg is not the most important thing. Only Raid racers think that, they would scrafice half of the kits of all tanks and make them 100% unenjoyable and bad if it would mean they get 20% more damage.
Lets NOT balance the game arround that.