I watched Wolf Children and Brynhildr in the Darkness.
The first one was really touching, sad and heartwarming. In a way I think it has a lot of beats Disney's Fox and the Hound had. I also give it extra points since I dig transformations in my stories.
The latter I was hesitant since despite popular opinion Elfen Lied is one of my favorite animes. Violence aside it told a bold story and while shocking at times it was also tragic.
Brynhildr from what I'd read it gave me the impression it was the author's intention to one-up Elfen Lied. But to be honest I think it's another take on the same setup [supernatural beings, evil scientists and grounded love interest]. I liked the first 4 episodes since like Elfen Lied the story keep rolling very smoothly that I forgive certain details for sake of pacing.
However as I watched further it seems the series needed more episodes to space out the next series of events since more than pointing to one episode when the show gets bad it's gradual like a deflating balloon. Also the harem being too dependent on the lead got tiring.
I liked the quadraplegic girl, the first life or death combat, the pacing of the beginning, the subtle reference to Elfen Lied, and the setup [made me cared for the harem].
Finally I don't agree this is as dark of a story as Elfen Lied, disregarding violence and nudity this story is feels more like a teenage dystopian story, since there's the lingering question of the characters surviving and the special circumstances they have. Heck it's better what I read of Maximum Ride which also had similar elements but didn't went anywhere with any of them.
I stopped at episode 10 since I checked and read that the last 3 episodes more or less condense 60 chapters of the manga, and most of those aren't filler.