IMO, the reason you start Dak as soon as he is ready is because:
- He didn't take any game reps in preseason
- He played like crap Game 1
- I don't want KM to dream up some Boise State pass happy crap with the extra week during the bye, just to "surprise everyone" with the starting QB
- (Maybe unfair, but it seems like KM does not like to run unless he has to)
Now, if Dak hasn't had a full week of practice before the Lions game, thus hasn't proven he is ready to go, he sits.
Then if he hasn't had a full week of practice before the Bears game, thus hasn't proven he is ready to go, he sits.
Hell, if Dak hasn't had a full week of practice before the Packers game after the bye, he sits.
But as soon as he's had a full week of practice, I put him in because he needs the reps. Period.
Now when is he ready? I have no clue. But the simple rule of "No practice, No play" would be my guiding principle.
JMHO