provide the ability to adjust the scale so the graphics can provide some meaningful information. I just finished a 20K interval run. The pace chart scales all my speeds. However, if I could scale the pace I'd have the walk portions slide beyond the chart so I could really see how consistent I was for the run portions. I had lots of hills but the chart scales from 250 to 650m ... and the graph line looks almost flat. I need to adjust this to 400 to 500 to see the changes. etc etc.
I find hard to read the Y-axis. Especially if you have it set to pace (min/km). If you click on speed (km/h) the axis is inverted, and then the information more meaningful, but yes, it requires some adjustments.