Set your homepage up to your liking. Add the exercises you like to do. Set up your own color palette.* (Color palette functionality does not exist yet and may never. But it sounds cool... so maybe.)
A full activity log sortable by be date or exercise type. Modify previous workouts. Sort and search your previous activity.
Enter your activity on the go. Maybe while you are in that boring meeting. Or how about when you are stuck behind someone paying with a check.