“Accipters” are definitely a frustrating case, there isn’t even a good term we can use now when you see a distant Coop/Sharpie that doesn’t include harriers as well (at least that level exists on iNat, unlike the equivalents for Anatidae). Sandwich Tern is another potential future case.
For waterfowl there are subfamilies that could be used, for example Anserinae contains all the geese and the ducks are divided into pretty sensible subfamilies and tribes, at least based on the list on Wikipedia. But iNat prefers to reduce intermediate ranks as much as possible.