Two things on Row Grouping settings:

1st - When using Row Grouping on a field to have the ability to disable the aggregation/totals on the group row. As an example the data is pointless and confusing as we use Booleans - 3 true and 4 false always shows 7… very misleading

2nd - As an admin I would like the option to default if a Row Grouping report is expanded or collapsed by default. It would be my guess that others would like this feature as well for reports that list items (think Whitespace)

Thanks,
DB