Though I'd have to defer to your doubtless greater knowledge and experience, I believe that the pedal opposing the cyclic allows the additional translating force of the tail rotor to assist with moving out of the VRS sideways, whereas forward cyclic alone has no such benefit, and would rely solely on the result of cyclic, ie. main rotor vectored thrust only.
Which control do you use to fly the helicopter in pretty much any direction? The cyclic - it has far more authority than the TR.
If the IAS is so low then full pedal will create yaw but not much else - the main movement will always come from the cyclic input.
Far more experienced people than me dismiss the Vuichard technique as window-dressing for IVRS recovery which can be achieved just by raising the lever.