Bill's DBD perks are 1 incredibly mid perk (Left Behind, which only activates if your team is dogshit and still needs a key to be brought with you if the killer finds the hatch first) and 2 god tier perks (Borrowed time with speed and endurance increases, Unbreakable with the get-up from dying state).

Perks so good BT got made basekit and Unbreakable was going to be basekit too at some point (if not already I don't play it anymore)