Why the preference for exclusively serif fonts? Maybe add the option of choosing between a small set of fonts?
Sans-serif fonts are better for those of us with dyslexia (overall base rates are ~20%). For specific suggestions, Roboto (open source with an Adobe license) or Proxima Nova are clean and inclusive.
I had a similar thought to prompt GPT-3 for one liners or to summarize some article (if available). I think involving the community to write 500-1000 winning submissions would have the positive externality of non-winners to distill/condense their views. My exploratory idea is that this would be instrumentally useful when talking with those new to AI x-risk topics.