The phrase "over subtle" implies that something is too delicate, nuanced or refined. Antonyms for "over subtle" include blunt, coarse, rough, and unsubtle. These words usually suggest that something is lacking in refinement or finesse. For example, a blunt instrument is something heavy and unrefined, often used for brute force. Similarly, something coarse is rough and lacks sophistication. On the other hand, an unsubtle approach might be direct and unambiguous, often without any finesse. These antonyms contrast with the subtle and nuanced meaning of something that is over subtle, suggesting a lack of refinement or delicacy.