I think adding Average BPM/Mile and Average Pace/Mile to the profile's weekly stats will be a great feature for the profile.
Average BPM/Mile/Week will allow us to compare whether our heart rate is improving week over week. If an athlete is using MAF training, then they need to confirm they are keeping their heart rate down week over week.
Average Pace/Mile/Week will allow us to compare whether we are going faster week over week and if we slowed down during our taper weeks.
These stats are calculated manually at the end of the week by athletes looking to see how they are improving.
An example of when I used this was today. I calculated my average pace/mile compared to last week.