Originally Posted by Wasatch Phantom

I hope you are very wrong on this.

Boeing listened too much to SWA in the design of the 737 NG series and the result is a mediocre aircraft.

I would much prefer Boeing start with a clean sheet of paper and design the best airplane they can. If SWA likes it: Great. If not: Too bad.

Limiting your design so it has a common type rating (to make SWA happy) is starting with at least one hand tied behind your back.