This is just a different way to write prompts, it allows some interleaving of calls to the API so you can build things up, write a conversation as a single file, with conventions around the text to send to the LLM.

I would not expect it to make a difference in your current applications. Getting JSON is all about the model, training, and prompt, in that order

If you are looking for low-hanging fruit to improve your JSON responses from LLMs, fine-tuning will likely get you the most bang for your buck. Start from a coding model like codellama, code-bison, or starcoder