Some years are going to work out that way, some years will go the other way when we have an injury at QB or RB and the offense is significantly less effective. Having Romney as a backup as really spoiled our fan base. He may have been a top 5 backup qb in the country. We wont always be so lucky.
As for the other positions, I don't remember ever having a team so deep at all the skill positions. This may have been the best WR/TE group ever at BYU. And the line did suffer after losing empey to injury, we werent as good against UAB as we were against Utah. But the depth at the skill positions help make up for that.