Quick Question: Subframe connectors- WHY didn't they do this from the factory?

Agree 100%.

If anyone's ever driven a car from the other two manufacturers of the same age and in the same condition, I don't know how you could come to any other conclusion.

All my non-iso t bar Mopars have handled like great big go-carts.
Easy to control body roll, and easy to point the front end with the gas pedal.
Never get the same effect with a coil spring car.