Form as necessary choice
Every formal choice in experimental fiction should be motivated by what the story requires rather than by what is unusual or ambitious. The non-linear structure that is right for a story about the impossibility of knowing the past is wrong for a story whose meaning depends on sequence. The fragmented voice that is right for a character whose self is genuinely disintegrating is wrong for a character whose inner life is coherent. Motivating formal choices means asking, before any formal experiment: what does this story require that conventional form cannot provide? The answer should be specific and rooted in the story's subject matter, not in the writer's desire to be innovative. The experimental choice that follows from the story's deepest concerns is the one that carries meaning; the experimental choice that precedes the story and shapes it from outside is the one that substitutes for meaning.