The Cutlass and all other GM cars should have been powered by an engine developed after the top brass has summoned the division heads, banged their heads together and made them pool their ideas to come up with a great engine, great transmission etc, perhaps as long ago as the '50s.
Having sorted out a superb drivetrain they should have been told to go away and style their cars to meet various market demands without competing among themselves, but taking sales from Ford and Chrysler, and as the market changed making cars that would make the overseas makers forget about trying to crack the American market.
On that basis the '80s Cutlass would have a smooth efficient corporate V8 with a corporate V6 economy option for the buyers who wanted a car with a degree of luxury and performance a cut above Chevrolets, Fords or Plymouths, maybe if they wanted a more performance oriented car they would visit the Pontiac dealer, or for more luxury go to the Buick dealer. They wouldn't visit the Cadillac showroom unless the Olds was the second car for the wifes' runabout or for junior to go to college.
And they wouldn't be visiting the very few importers showrooms unless they wanted a car for a special niche not covered by American makers, such as a small sporty two seater or exotic supercar, or perhaps the snob value of a Rolls Royce.
I think that's what Alfred P Sloan would have wanted.
However in the real world the Oldsmobile heads did their best with what was available, G bodies were good cars for their time, reflected in sales figures. Remember making cars is a business run by businessmen, not car enthusiasts. As gearheads it's up to us to modify our cars to our own requirements, if we own a G body it's because we like the basic platform.
Roger.