Yes, and if I do know that for sure, I should block the PR. Getting insights on the exact problems the PR addresses is what the Author already did and it would be wasteful and micromanaging from me if I would try to do that again only to find out whether this is the case here or not.

My non-blocking comment is exactly a symptom of me being unable to decide whether I would block or accept it. I just ask for the author to improve the PR so this can be decided on.