[digitalcraft]

but imo it's main problem are the dimensions.

While I agree, the problem is that its trying to be too many things at once. The Mustang is the Ford car enthusiast car in the US right now, but its also supposed to be a normal car. It has a huge range of performance options from a very plain car to a pretty sporty car.

Saleswise, its pretty smart, because you can develop all this performance stuff, and then sell the base model like hotcakes. However, this means that you have to make common everyday driver considerations like amount of room considerations when building it. And that sucks when you're trying to make a sportscar.