There’s of course no guarantee that something like the envisioned research graph would have the answers to your questions (it’s hard to predict what users will want, but I think graphs handle this user-uncertainty challenge better than traditional literature reviews) but it might help?
This is not an answer to your questions, but I can’t resist pointing out that this post/set of questions seems like a decent illustration of the use case of the project idea I describe here: https://forum.effectivealtruism.org/posts/9RCFq976d9YXBbZyq/research-reality-graphing-to-support-ai-policy-and-more
There’s of course no guarantee that something like the envisioned research graph would have the answers to your questions (it’s hard to predict what users will want, but I think graphs handle this user-uncertainty challenge better than traditional literature reviews) but it might help?