Idaten is nice. Didn't expect it to be so from profiling the promotional images, but I did read all of
@LauderdaleBoss posts on it and he was right. The animation staff has talent who worked on Mob Psycho, FMAB & Symphogear. Studio is MAPPA. Animation is good. Music is too. Like the character Rin. Reminds me of Genkai and how she'd beat lessons into a stubborn Yusuke who figured to carry on her legacy someday.
on the nun scene - its using the dramatic irony of being violated in a sanctuary by atheists, while fully believing she would be saved by a higher power that cared for her existence, to establish the realities of the world that the story takes place in. There are no altruistic heroes. The gods don't care to save humans from other humans, no matter how vile they may be. They're selfish and unempathetic entities who will only act if humanity is on the brink of destruction, yet have the complete trust of humans that look to them for guidance during moments of individual crisis.
So its an entirely purposeful scene in context of the story and the themes its trying to comment on. It's also offensive to lots of personal sensibilities and I'd be surprised if this ever got licensed in the West. Even though its mostly just good fight scenes and has a nice art style, one or two things is gonna make it controversial and ensure that certain people never touch it. Obviously not one of them.