Well this is what the CASA Flight Training Manual says:
RECOVERY WHEN THE WING DROPS
Use the standard recovery, i.e. simultaneous use of power and forward movement of the control column. In addition rudder must be used to prevent the nose of the aeroplane yawing into the direction of the lowered wing. The ailerons should be held neutral until control is regained, when the wings should be levelled.
The thinking here is to provide a consistent safe recovery and to prevent entry into a spin.
Note the use of rudder is to prevent further yaw, not to “pick up the dropped wing”. The ailerons should be held neutral until the wings are un-stalled, otherwise trying to “pick up” the low wing with aileron will further increase the angle of attack of the low wing and further aggravate the undesired roll tendency.