i've also thought about "reverse picking", but it never seems to work as well as normal picking. it may be just me, but it is easier to apply slight tension rather than remove it. once the tension is light enough to unbind, then you have to deal with the downward pressure of the spring and momentum of the pins, rather than your own variable pressure that your could adjust with a pick on an individual pin. the springs want to do what they were designed to do, push all the pins down (assuming the pins are on top)

, and that force combined with the different binding order of the pins makes it impossible to adjust the torque for different pins because its an all-or-none set up with a flat edge in contact with all pins. I suppose its possible, but not very likely. I'm not really an expert so i'm sure others could shed more light/experiences.
cheers