I am not saying if we would or could design it, I like many moan that cars arent what we want, rather than keeping on moaning after each car comes out, why not tell Ford what we want in a car.
As a group we could provide the high level requirements / specification of what a drivers car should be, what we want. There are a lot of guys specializing in the nuiances of design at Ford and they would ultimately define that hopefully iterating with us (I am dreaming I know but hey thats how new concepts are born, thats part of my job). We as the end user with Fords approval provide input to those guys on what we want.
This might include some indication of geometry and physics as part of description of what a real drivers car for the consumer market should have.
How much computer control should it have, should it have self selecting gearbox or a manual clunky gearbox, Do you want to see what the ecu , management system is doing, can any of be tweaked...
I dont know if you guys see this in the UK but I have repeatedly heard the concept of customer specified individual vehicle assembly as a goal for auto manufacturers. And the role of the local dealer to be able to provide this customization as part of their value add service... Each year of increased technology we are showing that is becoming more and more feasible.. A recent show we did talked of M&Ms with your name on each M&M, the worlds changing... and we can manufacture to order way better nowadays.

I guess we could ask homer how he got started