I think Camila is perhaps mistaking being a solo artist for creative freedom. She's about to realize, that especially on the same large label, her choices are still very much going to be guided by the same EPIC stakeholders as before. Unless you're Chance and independent or a label owner like Taylor, your "creative freedom" is guided by market research and execs. Hence Camila's possible change in direction from singer songwriter to R&B dance music now.
It’s true that she’d still be controlled by her label and management, but I think what she meant was she at least has more writing privileges, which is what she wanted all along. A girl group has a certain image and sound that they had to follow, while if one is a solo artist, she at least could play with different genres, mix and match, and include more of her songwriting.
But yeah, escaping her 5h prison cell, only to find out that she’s still in a bigger prison. But she seems happy, that’s what matters in this life, to find something that makes you excited to wake up.