I'm not particularly surprised: they planned 5 missions, all short in time and distance. Since every gram has to be accounted for (how many grams of fuel to a gram of sensor to Mars?), my guess is they equipped it with the bare minimum sensor package for the 5, and hoped maybe to get a few more missions in.
My speculation is that the next one will have a host of sensors, given how much more likely double digit missions of greater length now seems.
My speculation is that the next one will have a host of sensors, given how much more likely double digit missions of greater length now seems.