I think I concur with some of the other scenes on here.
What I like: the main character, Alon Palatio, for the most part, seems like a likeable guy. The story makes clear from the start that he is not overpowered, and everything he has starts from scratch. What he has is his knowledge of the plot and his wits. He is constantly shown working to gain more power, progressing ever-so-slowly. He slowly amasses a reputation as a terrifying manipulator despite his cowardice, oftentimes because of his facial expressions. Besides that, I also like the Five Great Sins as anti-heroic protagonists. People compare this to Eminence in Shadow, but unlike in that series, this story's version of the Seven Shadows aren't overshadowed/made incompetent in order to facilitate Cid's fantasies. They all have very same-y backstories (family all tragically killed by some evil force, then sold into slavery), but their backstories and powers are varied enough, and them going their separate ways in order to fulfill the Great Moon's will when he's just sending them to places where their natural talents will allow them to prosper and giving them an leg-up based on meta-knowledge. I like Alon and his main henchman/friend Evan
What I don't like: I'll reiterate what the others on here see: missed opportunity. Alon is never shown changing at all over the course of several years. His magical power progression, while logical, seems to be the only thing that changes. He and his henchman Evan seem unaging, static, and only really interact with each other. From the comments here, I don't think I'm alone in feeling disappointed that the Five Great Sins don't interact with our main character except through letters. Outside of Evan, Alon doesn't seem to be close with anyone else. A loner protagonist could work, but the problem is that we don't see him interacting with others as part of his day-to-day as the count. There's only a scene or two at the beginning with his servants, and then a scene perhaps with the nobility. Also, the Sins? They seem way more interesting than Alon because of their motivation, but again, we don't see them interacting with each other too much. Yutia seems to be the leader, and the rest follow along either out of gratitude for being saved or because they ulterior motive of revenge. I'd like to more of the Sins fighting bad guys in epic fights or visiting exotic lands, but we only see tantalizing snippets of this. Instead, what is focused on is the domestic life of Alon and Evan as he lazily goes about making preparations.
Overall, while the story is not bad, it's also not good. If it keeps going down the direction it is going, I don't expect much to change. It's a classic overpowered protagonist misunderstandings comedy, but it lacks the hype moments of Eminence of Shadow or the worldbuilding depth of Overlord. Its art is astounding, so I'll continue reading it for that, but I'll be pleasantly surprised if anything in the story stands out to me as a "wow!" moment.