Good adaptations aren't scene by scene, line by line reenactments of a book. It's a completely different medium, that the creators can use to tell the story a different way. Besides budget issues (just writing a scene where a bunch of crazy stuff happens costs about $0, while portraying it on screen is a different matter), the pacing/flow is different in live action stuff than books.

The SPIRIT of the adaptation is what matters. The original PJO movies weren't bad because Annabeth's hair was brown or they didn't say the dialogue straight from the book or dare I argue, because they mixed in elements from further in the series. Rather, it was bad because the vibe was simply far too edgy. Percy was sassy, it did have humor, monsters were fine, but it fell flat on its face because it didn't understand its characters, its world, or its TONE. THE TONE. It was genuinely awful.

Good adaptations expand on the source material without losing the charm of the original. They understand what makes characters tick and what's at the core of the journey, its not about aesthetics or being faithful to the point of being dull and having nothing new to say.

The PJO series is doing that. Having Rick involved probably helped a lot. It has a rocky start, in my opinion. But from the second half of ep. 2 and into ep. 3, I see it gaining its footing.