PROC REPORT does not repeat the values of a group variable from one row to the next if the value does not change, unless a group variable to its left changes values.
It would be great to have a REPEAT option that changed this behaviour so that GROUP variable values are repeated on all rows regardless of their values. This would allow REPORT output to look more like a "super" PROC FREQ with not just counts, but sums and other statistics.
Where there are many GROUP variables in a report, repetition of some or all values can make it less confusing to some people.
It would also be a very useful option when reports are output to other products like Excel that you want to analyse with filters, pivot tables and so on.