Do not be fooled by the relatively low score of this anime. I can already classify it as a hidden gem, an underrated masterpiece if you enjoy isekais. In this review I will tell you why.
First off, lets address the low overall score of the general MAL public. At the moment only 4 episodes are out yet there are plenty of ratings given. What I found on the forums the majority of haters give arguments like "The MC is female so I can't relate" or "wow, a reverse-harem". Dismissing an anime because of random shallow reasons and giving a 1 speaks volumes about how you shouldn't blindly follow others evaluations and see everything for yourself.
Anyway, about the anime itself. Do you enjoy a stress-free isekai? Do you enjoy watching the main character adapt to their new surroundings and grow as a person? Do you enjoy seeing them discover amazing powers that help everyone around them? Well get ready for a wonderful time.
The Saint's Magic Power is Omnipotent pacing is perfect - there's just enough story and progression that you want to keep binging it, however not to the point that it overwhelms you. You can enjoy seeing cute characters exchange sweet smiles and small talk, yet still sense a goal. A goal of remaining a normal girl in this unusual world, with your powers inevitably getting noticed by more and more people.
If I were to compare the environment and world-building to some other great title, Ascendance of a Bookworm comes into mind. The art is beautiful and the atmosphere is cozy. There's no lurking danger around the corner, however the character's inner thoughts and struggles keep driving the story.
In conclusion, if you like wholesome anime's with a cute and strong MC, if you like putting yourself into their shoes and experiencing the progression together, you are at the right place. Lets cheer on the ordinary girl Sei, who just happened to receive the powers of a Saint and decided to brighten up everyone's world. Yay!