This is where I feel like we've solved a third-order problem. If you're sorting all PRs into those two buckets then you should probably take a step back and redefine what a PR is for your organization, as both 1 and 2 make the assumption that the PR is too big to review in a single sit down or that the author didn't put in enough effort to craft their PR. Both of these should just be rejected outright in favor of doing things in a smaller more manageable way, instead of having an AI sort through something that a human should have started with. Obviously this is more of an ideal situation and a lot of companies don't work on the ideal which is why I think your product will find good use because companies don't want to invest in slowing down, only going faster.