That's an interesting question, Will. 

I think the main challenge is that being 'less biased' in this case isn't really feasible because the AI would be trained on data and that data is, by its nature, biased. You can certainly use AI to assist the democratic process by, say, checking politician speeches for factual accuracy in real-time but as for itself being an expert in the way you mention here I'm not sure how that could be more feasible than just using a human who has an edge over the AI via a deeper contextual understanding of the world.

For the visualisation that's certainly feasible, but again you run into the problem that you can make statistics say just about anything you want. Stats and data are often very misleading, especially in democratic (and non-democratic I guess) politics and a major problem with AI is that it really struggles to differentiate this due to missing contextual information.

As for specific AI safety decisions, I can only answer from a policy perspective. I will let a technical expert answer that side. For policy/governance, I think many of the important decisions around AI safety along this line require a very human understanding of complex human systems, and so I can see it being useful as a research tool but not much more than that in that respect.