Don't look at me, only playing to the competition rules. (I even asked for a utility requirement, which incorporates power-to-weight scoring.) I don't contest that I made a shitbox, probably worse than everyone else, but it's a very reliable and cheap to run shitbox, which is what the client called for.
Improvements could be: different wheels/tyres, smaller brakes and SLS front drum, a little bit more morphing, no sway bars, and possibly a turbo and fiddling with the gears could achieve sufficient economy gains to outweigh reliability loss. I didn't do any of that because I can't help making some concessions to reality.