100% valid and fair point.
This one is pure opinion...but for me, at some point a modification that changes a fundamental characteristic of a car loses the essence of what defined the car. The suspension layout is one of those things that (in my opinion) defines Mopars of this era.
Making the stock style suspension better is fine...switching it out for something that affects every moment of the driving experience that could easily be in a Chevy Nova or Ford Maverick just changes things a bit too much to still call it a Mopar A-body.
Would a convertible Duster still be a Duster? Would a Barracuda with a diesel engine still be a Barracuda? Is a Valiant with a monster truck 4x4 setup really still a Valiant?
Where you draw the line is a personal preference, of course.
If only Plato was here to explain the universal platonic form of a Mopar. he could clear this up. :D