
" I just don't see anything wrong with people trying to create a healthy, extremely sociable, confident, scruffy, low shedding dog. Obviously it's very early days, and there will be variation, but as long as potential puppy purchasers are made aware of that, it's their prerogative and nobody is getting hurt."
I think you need to look at the bigger picture.
There already is in existence a breed to suit all the requirements anyone could want.
For example I wanted a natural Spitz type breed. Also a with a sensible coat that needed little grooming when not moulting, so that took out some of the longer feathery coated types.
I did not want a working sled dog breed as I could not meet their needs.
I wanted a breed that was not quarrelsome or very dominant, so that removed some more of this type.
Had to be medium size, so that removed some of the smaller types.
I was left with my breed which is medium size close coated, easy going affectionate, but proud and independent.
Only fly in the ointment is they are a hunting dog so are naturally independent and will range ahead. Training and management are the answer, and they are certainly no more of a problem in this regard then the ever popular often mix-bred terrier people call Jack Russell.
I would never seek to eliminate these hunting traits as they are what make the breeds character. I have in fact travelled to mate my bitch to a hunting and show champion, and in imports direct from hunting dogs in Norway have come some of the best dogs from the character point of view. It is what keeps them outgoing, even tempered etc. These have also been some of the most trainable, you just need to know what the main drives in a breed are (which will be apparent from the purpose they were bred for, which you won't know in a cross from widely different breeds), some are more compatible with being easy to live with than others. The aforementioned Racing Greyhound can make one of the easiest pets to live with, yet care does need to be taken with their sight driven prey drive.
Many of the best family dogs are in fact hunting/gundog breeds. The traits that make them so are in fact their hunting ones channelled in another direction. No dog (except a stuffed one) will make a good companion without training.
Most people do not do any serious research into their needs and lifestyle and the requirements and nature of the breeds they are looking at.
The problem with seriously designing a new breed is the huge number that WILL NOT MEET THE REQUIREMENTS. For every pup that is just what is desired there will be half a dozen that are not, and this process has to be repeated over and over and over to get a wide enough gene base on which to base a whole breed. It is not acceptable in my mind to breed lots of dog the vast majority of which will not meet the ideal.
In your show or working bred litters there may only be the one puppy that meets the exacting standards for the best looks and ability in detail, but most will still meet the standard, and you will know what you are getting I am only speaking of properly bred pedigree dogs).
Your Labradoodle is already starting with two breeds both that have similar and different inherited health issues, so once you have created your breed you have added these issues together so instead of a breed with say two serious health issues you now have one with four. this has been exactly the experience in Australia, which is why they are now trying to fix things, by adding new blood from other breeds, but of course the danger is they may bring in problems from these they didn't already have in the existing gene bank.
Those who have a fascination with genetics, or like something unusual and want to devote their lives to breeding have plenty of scope to choose any of the breeds that have low numbers and need new dedicated enthusiastic breeders that can move them ahead and continue to eradicate what ills have been accidentally allowed to proliferate.
Exactly what traits are missign in all the hundreds of known breeds that can be found in the average labradoodle (oh yeah no such thing as an average one), after all if the breeds used do not already have these traits then their crossbred offspring aren't going to. If the desired traits are already to be found then why crossbreed.