My experience is that Claude or others are good at pointing out things I will want to look at and then I can go review more thoroughly. So it's helped to some degree.

But like everything else with it, it tries to do too much.

What I want is a review "wizard" agent -- something that identifies the pieces I should look at, and takes me through them diff by diff asking me to read them, while offering its commentary ("this appears to be XX....") and letting me make my own.