More tampered implies that something has been further altered or interfered with beyond the original state. Some synonyms for this term may include "more manipulated," "more tinkered," "more messed with," or "more meddled with." These words all convey the idea that the initial condition has been changed in some way, often not for the better. Alternatively, one could use terms such as "more adjusted," "more modified," or "more refined" which imply a purposeful and positive change. It ultimately depends on the context and tone of the sentence to determine which synonym best fits the intended meaning.