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The main thing to know is that EAT is only confirmed to be a rubric for the human quality raters, which means this only matter significantly if you are penalized or as a preventative measure for sites in those niches. Speaking of preventative measure - while it’s good to educate clients on this and get them oriented towards it for the future, probably not the necessary to go crazy with reactive changes.Where this actually gets into advanced SEO territory is determining how EAT might scale algorithmically. What computational factors and inputs might the algorithm use to judge this in the future? That’s still predictive and proactive, but it will become the future of SEO once Google figures that out.