Should the uncocking of the left wrist be a conscious action, or left to CF?
CF should uncock the left wrist for swinging per 2-P last para.
In 4-0 Mr Kelly recommends a firm grip and flexible wrists.
A firm grip prevents distortion of the clubface on off-center hits as well as added support on on center hits.
Flexible wrists allow CF to uncock #2 Accumulator and roll #3 accumulator. Stiff wrists, well they don't allow CF to be "Master and Commander".
Train yourself to have a firm grip and flexible wrists, its not impossible and it is necessary for the master says..."Very few are the mistakes and troubles of a golfer that do not stem from faulty Hands."