My winmo device was recently couple months broken and in service, in that time i tried few times nokia's sport tracker. I miss many things from it, calendar view was very good.
Viewing logged trainings in run.gps you have to open menu, select tracks, scroll to date, click track, choose load to see tracks information. In sports tracker you open one in list and you can watch training views and details with up/down button, to see previous you click left button or nex right button. Also track colouring depending from gps quality was quite nice.
And when you look at usability, recorder, map etc views was changed simple up/down button. In run.gps you have to hit small icon in lower left corner and select different view, not so easy. Maybe you could look some hints from sports tracker to delvelope run.gps even more nicer than it currently is.