In any case, I have come to believe that arb wins and losses are purely arbitrary, ha ha, with the player winning 2\3rds of the time, regardless of your counter and his deserving it.
I never take anybody past the 1st arb year, unless I am reasonably certain they will type A\B at the end of arb, AND I can afford them. After year one, sign them or kick them, period. In any case, the ones you release you can almost always sign back in the last FA cycle cheap, and if not, then someone else overpaid for them. (In Economics, that is called "The Greater Fool" theory, and it is just about the only Economic rule that is accurately labeled.)