I know it might sound a bit far fetched, but maybe you can still put it in the backlog for later days.
In today’s “follow mode” you are not really following anyone, you are basically creating a track of your ride…
How about having a real follow mode, where you could follow the real time track of someone else? When riding in a larger group it happens sometimes that you get stuck at the traffic light or are unable to overtake a slow vehicle and lose your group… if it would be possible for the tour guide to leave a “trail of pebbels” that everyone could follow, then noone from the group would ever get lost by taking a wrong turn.
For sure, it would need some intensive mobile data traffic, but might still be possible. What do you think?