Summary of estimated/actual hours by work item

I appreciate the new itemized actual vs estimated hours by category in the summary. As a refinement of this, it would be great if you could add the ability to generate a summary of actual vs estimated hours based on work items addition to categories. I often have projects with multiple deliverables (i.e. logo development, stationary, signage, promotional brochure etc.) that share categorical work items (i.e. art direction, graphic design, print production management etc.) — I need to be able to get  more granular with the summary so that when I'm estimating in the future, I can estimate based on deliverable-specific work items rather than general categories. In the past I have done this by duplicating work items (one estimated/one billable), but this doesn't make for a great workflow — It would be helpful to display this data in the summary. Thank you.