Since you started out "Why can't Winnebago ..." I looked through old brochures, and Winnebago did. In 1998, Winnebago updated the Brave to flat-front styling with basement, no slideouts. The floorplan you show was produced in the Brave SE line, 1998-2001. Thete were optional bedroom arrangements, but transverse queen was one of the options.
Actual length was 26 1/2 feet, and the chassis was 12,300 GVWR G-series borrowed from the Chevy van, with 14,800 GVWR P-series (step van) chassis optional.
The shorter models disappeared from the Brave line in 2002, all Braves got at least one slideout, and shorter models were available in the all new Sightseer line that also had slideouts.
Winnebago was somewhat behind Fleetwood in the 1990s, in raising the house above the chassis to make for large basement bins, and going to flat-front styling. Fleetwood led in this with the Bounder, then carried over to lower priced Southwind Storm and Flair lines, while much of the competition was still using aerodynamic styling for coach fronts.
