In many running races, you see a lot of runners during the race, but in ZP, you see a smaller subset. A big reason is because there's no real benefit to syncing. If there was a way to display more run metrics, I think that would change.

Displaying, avg. mi/km, fastest mi/km, line graph of mile splits over a run to easily see the difference in pace (easy to see if running negative), fastest 200m, 400m, 800m.