interesting...
interesting idea, but i'd rather give some weights to the parameters of the equation, e.g.
overall rating = (1*pot + 1*position + 0.3*safety + 0.3*bank + 0.1*kick + 0.5*break) / (1+1+0.3+0.3+0.1+0.5)
if you have an open layout you may want to have lower values or even zero out...