I've had 2 classes with pretty good results, but I had to work it that way. I loaded an reloaded until at least one QB was high potential. Year one Locker got picked in the first round by the 49ers. Quiz Rodgers lasted til the 3rd round, when I selected him. He's got 93 speed, 96 accel. He's pretty good. Mike Pouncey went 3rd overall - he's the only top guy I remember cause I really wanted him and was pissed he went so high.
In year two, Andrew Luck is a predicted top 10 pick - I've yet to do the draft cause I'm working my way into the top 10
But this 2nd class is a great corner class. Janoris Jenkins ran a 4.29. Quite a few upper echelon corners.
All that said, you have to work on it. Sim to the final week of preseason, save before you advance. Then advance, load the class and scout the guys you think should be high. Sometimes QB's will jump up after scouting. If the class isn't up to your liking, keep working on it. If it looks like it will be (during week one), save it there under a new file name and sim to week 6. If it still looks good, just reload the week 1 save. Does that make sense?