There will always be dirty talk with switching pronouns because it's an important part of the (feminization) play, in my view. That said, only a few of the ladies go 100% feminine wording, and that is also as intended. I'm currently not planning any expansion of the text to include pronouns; MC is a (fem)boy who sometimes gets called a girl.
There is also the topic of the workload; giving players the option to choose the pronouns means that I would have to rewrite a solid chunk of the game, not to mention expand all future scenes. Sorry!