I made a suggestion on uservoice. I like that little debug popout. I like that it shows the pages' load times, but I'm wondering if that feature can be expanded to show load times for individual elements, such as sub templates or even smarty tags. This would be a beneficial feature to help bloggers find an element or a few that are leading to the loading of their blog bogging down, especially if doing such a thing wouldn't negatively impact load times.
[link to suggestion]