Dragons, magical sports and Puerto Ricans? You'd think this book was made for me. It's a great premise, but unfortunately fell down hard on execution. I don't think I've struggled this much to finish a book in years, especially a YA novel.
First off, the characterization came off very shallow. We spend the entire book in Lana's head but I don't feel I got much out of her other than "I love Blazewrath," with everything else in her head revolving around that. Even her "am I Puerto Rican enough" problems felt kind of... shallow. The opposition to her being on the team felt more like typical "this person is an outsider to our close-knit circle" than it was about her being raised on the mainland. (Like Lana, I am half-Puerto Rican and raised on the mainland, so maybe I was expecting something a little more meaty in this regard, especially since it seemed to be a selling point of the book.)
The characterization was almost non-existent when it came to the other characters, who really read off like points on a personality checklist: snobby cousin (the Dudley of the book), the wacky best friend (with the supportive family, a la the Weasleys), the bitchy "mean girl" of the team, the super cool government agent. What do we know about them besides the traits I just listed? Not much. The bitchy mean girl has a tragic backstory, which... of course she does. And then there's a huge cast of diverse characters whose entire existence seems to be name + job + queer. The book is "diverse," but they don't actually add anything to the plot. The super cool government agent is trans, but her super cool government agent happenings are largely off-screen, and she didn't substantially affect the story in any way. It really just felt like she, and the other queer characters, are also just there to check off a list. It's telling that, outside of President Turner, all of the main characters appear to be cishet. (I believe Lana says she's bisexual, but it never comes up after the initial mention.)
(I think Andrew and Takeshi are a rather refreshing pair as close platonic male relationships like theirs are still a rarity in a lot of YA fiction, but it's still only a surface look since this is Lana's story.)
The overstuffed cast and ensuing lack of characterization wouldn't have bothered me as much if the plot was better. The initial setup is intriguing, but ultimately falls down hard because every plot reveal is extremely obvious or a complete deus ex machina. Nothing is carefully woven through the book, and the big reveals are often unrewarding because you saw them coming a mile away. This book is a long laundry list of clichés that will ensure its page on TV Tropes will be a long one. (I won't discuss particular points because of spoilers, but there was at least once where I said OUT LOUD "because of course she is.")
This book is definitely an "obviously inspired by Harry Potter" book, which in itself isn't a problem, but, like Rowling, some of the worldbuilding does leave you scratching your head, namely Blazewrath itself. Why do magical sports always have to be so needlessly complicated? Just adding the ability to fly or in this case, freaking dragons, would have been enough to make a known sport like basketball or football/soccer exciting. Instead writers always feel like they have to come up with convoluted rules that make less sense than baseball.
I don't really think of this as a one-star book, since there's plenty that's competent, but I really, really, really didn't enjoy it.