A simple premise, typical character archetypes, and conflicts you can easily predict the outcome of. It wouldn't be unfair to label this show, "The standard" of what you'd expect these kinds of shows to be like. Were there a benchmark for this genre and category, this would be par.
But it's still entertaining. The animation is pretty fantastic, for one. Obvious attention to detail, and combat sequences are done with deliberate care. Also, some of the humor is quite funny. Even within the expected confines of usual tropes, they throw a random curveball here and there just to keep it interesting. An overarching storyline is dropped in a little past halfway, with some mystery that'll be revealed in the seasons to come. Honestly, this almost feels like a test run. There's not much original world-building as if they're unsure anybody will be interested in more. We're dropped into this familiar storyline, and as the plot progresses things start to be introduced that makes it a little more unique going forward. There's definitely potential here.
Another user titled their review, "It's okay for now." This is probably the most accurate take in the fewest words possible. The true quality of this series is completely dependent on what comes next.