I was exposed to this way before Year One and it's one of my favorites. I love YO but I agree about wiping out Batgirl. However, I think you can have both this and Year One. As much as I love Untold Legends, I'm not a fan of Alfred coming in long after Bruce becomes an adult and adopts Dick. Everything else can still work. I still love the scene where Gordon becomes Bruce's ally and it still remains a powerful moment. There are some ideas I've warmed up to over time as well like Dick being around when Bruce met his Rogues Gallery. I think that made their relationship much deeper and meaningful.