Thanks for all the comments, suggestions and answers. I guess I made a basic mistake in thinking that FR would meke improvements when designing a newer and more expensive version of the same coach. i.e. 21QB > 23QB
They had some nice functional features in the low cost entry level 21QB such as heat duct in the bathroom and external suction line for winterizing.
I guess the "race to the bottom" is just too strong for an RV company to consider continuous improvement as better than continuous cost cutting.
I know this has taught me to never recommend any FR product to friends. Have already steered a close friend away from FR for his purchase this fall as I do not want to be blamed for suggesting he buy an RV from a company with such a poor track record on quality and functionality.