Bugfixes for how some actions are modeled have been deployed to the beta site.
Byregot’s Miracle is now treated as unusable when the Inner Quiet stack is at 1 and thus should have no effect. Similar fixes have also been made for Byregot’s Brow, Precise Touch and Trained Hand.
Byregot’s Miracle also now halves the Inner Quiet stack correctly.
EDIT: I’ve also just deployed a fix for the XIVDB tooltips on actions.