The antonym for "more widestretching" could be "limited" or "narrow." These terms mean that something is confined, restricted, or restricted within certain boundaries or limits. They imply a constrained or constricted nature, in contrast to the expansive, far-reaching concept of "more widestretching." These antonyms could be used to describe a variety of things, such as a person's knowledge or experience, a company's products or services, or the scope of a project or initiative. In any case, "limited" and "narrow" suggest a smaller scale, less breadth, and a more focused approach.