I have been as big of a critic as any, but I will throw this out there as food for thought. When installing a new offense, reps are just as important for everyone else on the offense, as they are for the QB. I have no inside info, but I am guessing that Lewis is still assimilating to the offense, and the coaches are not inthralled with limiting the playbook at the expense of the other 10 guys on offense. I prescribe to the idea that Lewis will play plenty this year, but he needs to have an offensive group around him that knows what the hell they're doing. If for nothing else, the role of Noyer in camp thus far makes a lot of sense for that reason (he seems mentally reliable, and he's a vet that will pick up the offense quickly, thereby benefiting the other 10 guys on the field). Hopefully the result is that Lewis comes in later, with a reduced set of plays, but an offensive group that is ready to grow the playbook with him, quickly.
This
It's not just about getting the (future) young star QB reps, but the rest of the offense needs to get up to speed and be dealt the best hand/mates available to help the whole team develop and succeed