Anyone currently playing FFXIV on Apple Silicon and suffering from audio stuttering or framerate issues should visit this site: https://www.xivmac.com.

Their downloadable app will repackage the outdated, inefficient and unoptimized bottle that the macOS version of FFXIV ships out with from Square Enix with a newer, far more efficient and optimized bottle from the Crossweavers community that runs FFXIV flawlessly on Apple Silicon.

I personally experienced an increase in fps and the annoying audio stuttering is completely gone allowing me to once again enjoy my adventures in game.