The antonyms for the term "more well-flavored" could vary depending on the context of the word. If for instance, the term refers to food, then the antonyms could be dull, bland, tasteless, insipid or flavorless. If the term is used to describe an opinion or conversation, then the antonyms could be uninteresting, boring, unstimulating, or tedious. In some cases, the term's antonym could be subjective, and it could depend on the individual's taste and preference. Either way, the opposite of a more well-flavored item, experience, or item is something that lacks flavor or excitement.