If they fail, almost all pouches fail at the side of the punch hole. I could beef up that part of the pouch till it is no longer the weakest part of the bandset, but that would cost a little velocity and if a bandset is going to fail, then it's a relatively safe place to fail.
Insteadn what I'd really like is a disclosing thread or another structure similar to the coloured thread in safety harness straps that would show the user when the pouch is beyond it's useful life.