There is no reason to trust Mo on the field until he has had significant time to learn how to play the game. He'll get smoked by any Offensive Lineman out there even if he is a future NFL Hall of Fame player. Guys with zero experience will not have the game "slow down" for them until their Jr. or Sr. years. Even seasoned high school players usually don't peak until their Jr year.
Bronco does a lot of things wrong but Ziggy going from zero to first round NFL draft pick was not a failure. Fans who whine about Ziggy do the entire program a disservice.