Here's another reason why we can give credit to Ridley Scott: he could have easily offered us HIS version of the film and forget about the other one, but he didn't. He made sure (or at least the studio) that we'd get both sides of the coin because people out there like the original, others like the director's cut and another group likes both.
Legend is quite a "naive" tale, but it is in no way meant as an insult. In fact, it is one of its most beautiful qualities that makes viewer wonder. Even the name of the evil guy (Darkness...) is "naive" in its form, but all this naiveté shouldn't refrain you to watch the film. Scott definitely has a talent to take you into horribly realistic rides as in American Gangster, as he has the talent to take you down the fairy path and make you believe in both worlds.
The special features aren't quite as full as we could have hoped for, and the behind the scenes aren't that immersive, but it gives you a general idea of how they made the film at the time, and all the struggles they had to deal with.
All in all, it's a nice experience of a Blu-ray but as a french-native customer, I would have appreciated the dubbed track, to hear them as I first heard them back in 1985...