You are using GM's favorite "Good enough" thinking which is just unacceptable. WHY should we still be making up excuses? You read the benefits of the 6 speed in the press release. It's just plain better. It makes for better acceleration, better gas mileage, and better towing. Like I said, GM penny pinching at its best.
You won't be there to explain that the 4 speed is "good enough" when consumers read C&D/MT/R&T's bashing of it.