I'll give my take on it:
Control - Increases stabilization for crystal synths, and prevent them from going out of control in the first place.
Craftmanship - Increases success rate of synthesis attempt.
Magic Craftmanship - Increases success rate and duration of special abilities (epiphany, preserve, maker's muse, etc.)
Output - Increases the quality or quantity of stuff dropped
Perception - Increases the width of tolerance in the hot/cold mini-game
Gathering - Affects the rate at which your stamina depletes for every pick
FFXIV: Cloe Delisle
Scholar, officer of the SWAGGER Free company, Sargatanas server.