There were several writers involved in this production, and it feels like it. The narrative is all over the place to begin with, but the biggest issue, BY FAR, is how Grancrest Senki breaks its own neck with the speed at which it progresses through said plot; they seemingly skip across 2 or 3 season worth of possible content in just 24 episodes. The end result is a fantasy/adventure/romance series with all of the pieces, but none of the magical feel.
The animation ranges from really good to really bad, sometimes even within the same episode. The music and sound is acceptable. There are some moments that do actually come together well, but the series as a whole feels insanely rushed and consistent in both storytelling and overall production, so those moments end just being reminders of the kind of series Grancrest could have been.
I won't say this one was a trainwreck, as I did still enjoy it a bit, but I cannot forgive A-1 for wasting so much potential. Maybe we’ll just pretend the records of all those forgottenl characters and sub plots were lost to time.