"...One can always imagine obstacles that any one particular rover design might not be able to handle..."
All mars rovers' movements must be "planned" for days due to earth-mars radio delay.
Moonrovers, thanks to "one-second" only radio-delay, can be driven in real-time.
This is a GIANT advantage (for space/time moon exploration) of moonrovers vs. mars rovers but may increase the problems that a rovers may have during moon travel.
A Segway-based design may help if some unexpected problems will happen.
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Moonrovers' Prize Competition
www.gaetanomarano.it/moonprize/moonprize.html