Seeing that it's an Omori story, I was afraid that it would become a Danmachi 2.0, fortunately this was just a fear.
We're not going to exaggerate and say that Omori wrote something completely different from what he did with Danmachi. There are concepts and ideas that were recycled for this story, this doesn't mean that it's a bad thing. On the contrary, I would say that this recycling allowed him to work a little more on his characters and try to make them feel different from any other in one of his stories. The theme of the warrior in a world of magic is not something new or fresh, but it is still enjoyable. Especially when it comes to seeing Will running around the battlefield because you give the animation freedom to get creative and give you a game of cameras and explosions that keep you glued to the screen. More than the magic system, the most interesting thing is the entire school credit system that was established to give an attempt at a scale of power and to know how powerful a certain magician or creature is. The character design is more notable for those with the Magia Vander title, who would be the strongest people in this world. The main sextet, I do feel, need something more to give them a good design.
On the negative side, we could put the fights above all the one at the end of the season. The development of the fights is good, they are captivating but their endings tend to be a bit anticlimactic, instead of ending with a great sequence, they end with a powerful blow and that's it. Also the slowness of the story, if you are used to Omori's stories maybe you already know what to expect, but if it is your first approach you could have noticed that this was only an introductory season. It feels like we haven't seen anything of the world and its characters because they focused so much on showing us Will, his potential and the secondary characters along with the beginning of their personal conflicts. So many concepts are mentioned to familiarize us with the world and its system but they are not explored further, because they are things that will be used later.
It's a story that I would recommend, especially if you're looking for something to binge-watch or watch while you relax. A story that doesn't demand much from you and that's why it's so enjoyable.
P.S. I will always be a true believer in Rosty x Will, and I will live in denial even if they reveal the truth about the character to me.