There's some great feedback in this thread! One reason we've been hesitant to modify the ranking display too much in TBA is that we don't want to cause any confusion about which columns are "official" and which ones aren't. However, I definitely agree that there are things we can tweak to make the display much more informative (we just have to clearly differentiate which numbers come from directly from FMS and which don't)
I think we can add a notion of "derived columns" to the rankings display on desktop: we can show a "match difference" outlining how many matches away from the max each team is (so it would show {-- (even), -1, -2, ...}). This could go in parentheses after the official "played" column. And we can also add RP/match.
This all gets a little trickier on mobile, because information density is hard.
If anyone would like to help build this for TBA, let me know and I'll help you get started! I've
filed an issue to track the feature