Well folks, this is my first attempt to add to the discussions in the forum. Not sure if I am doing it right but here goes.
We are not new to camping and from what I am reading, it seems everyone has problems with their new trailers / camping units. All I can say is that over the years, we have accumulated a mountain of RV knowledge and it came from the same problems you describe and more. Traditionally we would buy used trailers / RV's and being handy, make do.
Our previous unit was a 33 foot motor home. Great unit, used it for 5 years and sold it (Retirement downsize) and purchased a new 2011 Dutchmen Lite 286 BHGS travel trailer in 2013. Yes there are a couple of issues (Bad water pump and curtains failing) but otherwise it is ok. Make note that a travel trailer is not the same quality as motor home so I expected a few adjustments to be made, mostly my attitude.
Just want to say that the dealer I deal with is excellent and the manufacturer has been very positively responsive to requests.