Increase the number of groupings allowed and sort functions of the reports. In excel and several other reporting tools you can sort and filter but multiple fields at one time. I know a second grouping was added but we need to filter and sort by project, resource, booking, and date specific data at one time. Also, the cache in the browser seems to limit what you can filter on within a report anyways because the integrity of the filters fail when you start adding multiple filters to the created report.