Do you think that its possible to raise the bar for junior engineers such that "you have AI now, so I need you to own farther up the review chain yourself"? I feel like I could answer either way. No, you need reps on projects to have that kind of judgement, that's what makes a senior. But also yes, while it will take the junior way longer to do that kind of review, they have the time to do it now, and its now the bottleneck so it makes sense to put their effort into that portion.

We have the same issue and now spending more time/energy on optimizing the code review agent.

This might lead to more automatisation and not less if it works. After all we might extract everything critical to us.

We also now expect juniors to review the other ones code first.