The antonyms for the word "more formulated" can be "less structured," "unplanned," "unorganized," or "improvised." When something is less formulated, it may lack a specific plan or structure, and may be more fluid or spontaneous. Conversely, something that is more formulated is typically more structured, well thought-out, and methodical. The level of formulation often depends on the context, as what may be considered well-formulated in one situation may be too rigid or constraining in another. Ultimately, the choice of whether to use a formulated or unformulated approach depends on the specific circumstances, goals, and desired outcomes of the situation at hand.