Sleep Quality Metrics

When can we expect for android sleep to implement the sleep quality metrics identified in the US National Sleep Foundation report from 2017

, i.e. sleep latency, number of awakenings >5minutes, wake after sleep onset, and sleep efficiency? The report suggests that these metrics are the only ones showing dependable correlation with sleep quality.
Also, one does not need to collect any reference data and can extract those metrics every day immediately after wake. Sleep efficiency and these other metrics should be available already after the first day of use, just by minute-by-minute sleep/wake evaluations (even only with accelerometry).
Other metrics (deep sleep/rem sleep fractions, irregularity etc) do not seem to have that strong of a published correlation backing and I believe those tend to confuse users more than they inform.