The term "more leading-edge" refers to something that is innovative, advanced, or cutting-edge. Antonyms for this phrase may include words like outdated, primitive, archaic, or antiquated. These words suggest something that is old-fashioned, backward, or obsolete. Some other antonyms that could be used for "more leading-edge" might include conventional, traditional, commonplace, or typical. These words describe something that is familiar, established, or conformist. While there are many antonyms that could be used for this phrase, they all convey a sense of something that is old, established, or conformist, rather than new, cutting-edge, or innovative.