If you have multiple ReportBuilder licenses, your account manager can redistribute the scheduled reports to any of your users. (If you have 5 licenses, all 50 scheduled reports can be assigned to one user if you'd like.)

ReportBuilder now provides a way to apply segments to data requests (requires SiteCatalyst 15.)

Time spent is available as a metric in data warehouse. Time spent on page and per visit can be calculated from there.

Great idea. We are investigating ways to make the overlays more useful on a page crowded with many links.