In a Premium group's Admin > Billing section, or a Free group's Admin > Upgrade section, there is a list showing "Your Group Features". My questions and suggestions are:
(1) In a Premium group, it says "Your Group Features", but it does not actually show your group's features! It shows the features you would get if your group downgraded to Free. I believe it ought to (also) show the group's current features - as it does for Free groups. Some of them might be obvious, but not all.
(2) Not all group features are listed. That is true of both cases (your current features, or your future features if you downgrade to Free).
The feature I quickly noticed was the <100 member limit in new Free groups.
(2A) If a Premium group downgrades to Free, would it become limited to 100 members?
(2B) If a Premium group that started after 8 Feb. 2021 downgrades to Free, would it become limited to 100 members?
Clearly, some features are not listed under "Your Group Features". I'm not suggesting that every single feature should be listed there. But I think the 100 member one is significant, so I do think it ought to show whether or not the membership is, or would be, limited. Currently it seems to show it only when the group already has that limit, but it says nothing otherwise.
(Is anything else missing from the list that ought to be shown?)
Another odd one is "Event RSVPs". In some groups, that feature is listed (saying either "Legacy Enabled" or "Not Enabled"), but in other groups it is not shown at all. Does that mean it is Not Enabled? If so, then why does it state "Not Enabled" in some groups but nothing in others? Personally I don't care about Event RSVPs, but I think the user interface should be consistent.
(3) It is puzzling to have to go to Admin > Upgrade, to see what are your group's current features, even if you have no intention of upgrading. But that's a minor point. I don't really mind, but I suppose someone else might. I see that it is called "Admin > Usage" in Subgroups because they can't upgrade.
Andy