"I work with models edit by edit" – That could be the cause of bias: Maybe because you're supervising small step iterations of the model, you notice issues that the model would have noticed itself if you had let it tackle a larger scope by itself. Worth a try in my experience. And the extra review agents make a big difference. Even if it's Opus reviewing Opus. Just by having a fresh context window, the model finds issues it created itself in another session. And with a different model, you get yet another fresh perspective. I find Codex is particularly thorough in reviews.