Hi Geoff,
I dont believe that it is the organisers responsibility to address reliability, nor should rules be changed to address this, but they can encourage it through design feedback. The australian comp was quite harshly critised by overseas judges in 2012 with all the cars too heavy and out of touch with the leaders in europe amongst\other issues. And this seems to be a common theme from what I have seen, that officials much more greatly encourage optimisation, vehicle lightness and other additional features, rather than simplicity and reliability. If questions were raised by judges/officials, not nessecarily in scored events, not on how much weight they managed to reduce their components by, but what features/systems they have implimented to improve reliabiltiy this would encourage this trend.
Interesting to note: The top 5 in Design at 2014 FSG didnt finish endurance, 1 of the Top 5 in Design at Michigan finished enduro (GFR, 4th) and ETS has won design twice this year (Michigan and North), but failed to compete either competitions endurance.
I know this only addresses a portion of what you are trying to convey, but I need to get back to work!