Dear Dorico team,
In some scores containing many different compound time signatures, it might come in handy to show the beat grouping above the time signature indication (see picture). As far as I know, this is not yet possible to do in Dorico natively, although it is recommended in Elaine Gould’s Behind Bars (pages 178-179). I would therefore suggest implementing this as a part of the time signature appearence options (or wherever you see most adequate).
All the best!