By having alternate crafts that can move quickly, we might be able to better guesstimate if it's worth the time of the slow rover to change course and investiga

By having alternate crafts that can move quickly, we might be able to better guesstimate if it's worth the time of the slow rover to change course and investigate a blip on the map. Alternatively, fast craft could fly around and drop beacons on areas of interest to be investigated at a later time. Beacons that could be sensor probes returning data of interest.