Yes, disabling the prompts of course cuts down requests, and not using Formamorph would cut down requests the most...
My main point is that there's no need to use an expensive model for all the requests, not only because of the costs, although that's the most important part, but also for the usability itself, as some models are actually better for offering choices or doing stat changes than the models that are best for game text generation. The idea is to be able to use full functional Formamorph at it's best, not to sever parts of it.
So I insist that being able to define different API endpoints for each of the different request prompts would be a great improvement of the game, both in costs and quality. Whether the dev wants to spend time doing that or not is of course up to them, this is just a humble request.