I like your car a lot yet, it reminds me of the Kyosho Fantom 20 4wd of the early 80s.
This concept exists in the Motonica P8F and the prototype BP 4wd pan car (they used to develope their upcoming suspension car). I think your best bet is to take it to as many tracks and run it, see what the racers think.
As stated previously, rules should be established that need to be adhered to. No evolution of rules. Look at the rc F1 of the 90s we all had to run silver can 540 motors, now the class is nuts - too many different motor/esc/battery classes, widths etc.