How about being able to use the mouse to select an area in the Profile window, elevation graphic? Right now a left click zooms in and right click zooms out. Being able to select an area of interest instead would be a really nice feature. The zoom feature wouldn't be lost, it would just be a little different. It would be like "zoom to selection" instead. The stats could be made specific to the current selection. This would make the Grade stat much more useful, for example, because you could see the grade over a user-specified section of trail/road.
On a related note, how is the instantaneous grade currently calculated? My guess is just the current point and previous point are used. This isn't a very useful figure given the relatively poor accuracy of any 2 points in close proximity - especially from GPS data.