even if you forget about the good/great players we let walk, there is still good evidence that the FO has failed us. Just look at the players we overpay: AA, Brunell, Carter, Patten, Springs, etc.
the jury is still out on some of these guys, but the underlying theme is that we overpay for old players and/or players who haven't lived up to their potential. sometimes this works, but the odds are against you whenever this strategy is employed.