Oh, I believe that this one was in trailer gameplay, or at least in dozen of other streamers gameplays. The Stunning Beauty is not that hard, and I'd say that she's a fun Boss.
She spawns the adds which stun you when they rotate, she summon electro-spikes that shock you, she throws a lightning bolts at you (as if she were Thor) and she can struck you by a lightning from the sky which hits hard. Once she summons here Overseer Eye - just shoot at it and she'll close it ;D