I like the idea of healing also sharing experiences of the person you are healing. I could explain it to a degree in a world of magic. But everything else is just bogus. I mean, ok, maybe he could learn some tricks from those experiences (if he trained), but "damaging healing spells"? "Predatory heal"? It makes no sense to me. Reverse time, wanting revenge - yes, but everything else no. As well as the fact, that a "so much needed healer" is treated like that from the start. At the least, I believe in reality the kind would be present at the healing of the swordwoman and if healer is, indeed, important - order to research his limitation and stuff. Well, yeah, princess orders similar thing, but under way different sauce. I can understand her disposition to someone from the boonies, but it still does not make much sense to me. He is not her enemy or rival, he will not become a prince or whatever. She has no real motivation here. And if she was a sadist, she would want to conduct experiments herself.
Besides that the flow is generally boring and it simply is trying to be edgy to spur audience's reaction, rather than make an important point from perspective of the story. You can smell rape for the sake of rape in coming episodes from the first several frames. People criticized Goblin Slayer for rape in the first episode, but there it made sense, it showed what goblins are and why you should not underestimate them. Here... It's just... Artless, at best.
