I tend to agree that Moore isn't as bad as some on here like to pretend.
And I do think that there were definitely some other factors contributing to the poor performances by last year's backup QB's- primarily the lack of Dez Bryant, and the rotating door at RB. Also the fact that we missed badly on Weeden caused a real domino affect. Cassel had no offseason to acclimate, and the season was over by the time Moore was getting "meaningful" snaps.
This'll sound strange but I honestly think if Weeden could've won just one or two of the games he lost, they keep him in there and we probably win some of those games we lost with Cassel and Moore. But, then we wouldn't have had a premium pick and still would've missed the playoffs anyway. OR, maybe they wouldn't have rushed Romo back and there wouldn't have been the 2nd collarbone break.
Who knows. We could play the "if" game all day I suppose. But, I digress. Point being we missed on Weeden and ultimately it cost us.