What, exactly, do you have engineers for, anyway?
Read “engineering and manufacturing feasibility concerns” as “beancounters refused to pay $1 more per car to make it not suck.”
Engineers can do almost anything. The real problem is the bean counters who tell the engineers how much money they get to waste on a car. That limits the ability of the engineers to do what they do best. If you only have money for solid axels and leaf springs, your car just isn’t going to ride very well. If you body is thin and you can’t pack it with insulation, your car is not going to be very quiet.