The phrase "go pieces" typically means to break, fall apart, or disintegrate. Some antonyms for this phrase could include come together, unite, assemble, or integrate. Rather than falling apart, something that comes together or assembles itself may be considered a success. Similarly, instead of breaking, something that remains whole or solid could be considered the opposite of going to pieces. Synonyms for this phrase may include shatter, fragment, or crumble. However, the use of antonyms such as unite or assemble may create a more positive and optimistic tone in discussions surrounding the phrase "go pieces.