Not sure if this should be in front-end or back-end (guess it should technically be in both), but one of the things I've used CrUX data for, which I'd like to see this expose, is effective connection type.
SELECT
origin,
form_factor.name as form_factor,
effective_connection_type.name as ect,
SUM((
SELECT
SUM(bin.density)
FROM
UNNEST(first_contentful_paint.histogram.bin) bin
WHERE origin IN ('https://www.bmwusa.com', 'https://www.infinitiusa.com', 'http://www.lincoln.com'))) AS density
FROM
`google.com:chrome-ux-report-test.chrome_ux_report.20171018_preview_origin`
group by form_factor, origin, ect
HAVING density > 0