Unfortunately, it's like with past versions, wherein the Category subtotals are always separated from the subcategory breakdowns in Summaries. We'll have to think on how we might support an option for grouping things differently in a future version. But, for now, you might check out the Budget section, where you'll find a breakdown like you're talking about for any Unbudgeted categories and subcategories—set the date range at the top and you should get something very close to what you're after as the out values are negative totals and in values are positive totals.