I think that's the point. People who care enough to install the system also care enough to do better than this system. People who passively save gas but don't give a crap wouldn't install a DFCO system
A stop/start system would be good. However, I think that is within the realm of an extra input/output and a few dozen lines of code on any MPGuino type of device.
From this point if we turn the thread over to general discussion of that notion and see if it has legs, it can get its own thread.