Personally, this anime is very underrated. Unlike typical Isekai anime with super-cheated and invincible protagonists, this one focuses on the development of a protagonist who, By mistake, he became a hero, being only a healer. I really liked the construction of the characters, the emotional story they tell us and, of course, the battle scenes and the power levels that are fantastic.
What I see from this anime that I haven't seen before in any other anime of its kind is the way they use sanction magic as both a power to heal (obviously), protect and save lives to then become a powerful combat skill, hand-to-hand against evil forces. I loved it.
I give this Isekai a 9/10.
Yes, I really agree with your opinion, one of the reasons I like this anime is that the main character is not given privileges over power like other isekai anime. Usato had to struggle so hard with Captain Rose's training that sometimes he almost felt like he was dying to complete it. Thank you for sharing your positive opinion about this post :)