I'll just say that's not good. Not good at all. It's a whole new system for him so he could be struggling with it early.
But on the flipside, if Dak had a really bad showing (and he has) in workouts, the excuse making would be pretty epic from some.
I've long taken the position that what vets do in workouts like these are largely meaningless in most cases. The most important news for them is that they get through camp healthy. So if Dak goes out and throws 5 picks against some team in a workout, well that sucks but for this franchise, the more important news is did he get through the practice without getting hurt.