The only thing the current regime did wrong, if you want to call it that, was not signing a veteran guy to come in after McCarron was traded. Beane said as much. And from what I've read, they tried to do so.
Other than that? Peterman played really well in preseason. You can howl all you want about preseason not counting, but he clearly beat out McCarron. No question. But he threw up again in the regular season games. Even last week he hits three guys in the hands and still got picked. Not much can be done about that. But clearly he has now shown he just can't be trusted.
So they brough in Anderson. He got hurt. Allen got hurt. Two QBs got hurt. The third guy hasn't cut it. So they had to sign a fourth guy, another vet in Barkley that has a meh history. What exactly do you think they're going to get at this point in the season, a Pro Bowl type guy? Barkley is Anderson is Sanchez is Moore is any other veteran guy out there in the same position.
So going forward you hope Barkley provides something. You hope Allen comes back after the bye. For the bloodthirsty I suppose you can cut Peterman. Other than that, what. Two QBs including your young starter went down. Any team in the league would have troubles then, unless you're playing the Raiders.