Zeffy, your descriptor of the braking reports should have considered the likely accuracy of the runway report, and the role which pilots have in judging the associated conditions - the big picture.
One weather report indicted 1/8 in of contaminant. That value and less, is termed ‘good’ (for contaminants - not the same as on a dry runway). However, just a small increment deeper than 1/8 could change the runway condition to 3 or even 2.
As much as the ground services might be limited by the measurement and reporting capability, so too piloting interpretations unless the larger picture is considered; think about it.
A pre-landing assessment of runway condition should consider both the reported conditions and lower values as ‘what if’, ‘just in case’, and particularly with a crosswind, likely gusts - taken as a limit.