Maybe those who enjoy this anime are only players of the granblue fantasy game (you can see the link on my profile). And I enjoyed this. This anime story isn't understandable for people who didn't play nor watch the Granblue Fantasy.
When this anime was first announced, I couldn't wait to see how they turned the comic strip from the game into an anime. The comics alone can make me laugh and they have thousands of pages. And all of those are enjoyable. Even though i can't manage to read all of it. Maybe Cygames won't show those thousand scene.
Hopefully this anime chooses interesting scenes to make the story enjoyable. Even though the target audience of Guraburu may only be Granblue Fantasy players (slaves).