I'm all for that. As long as it looks like a dobie, walks like a dobie, barks like a dobie, behaves like a dobie, I'm OK with whatever "less than pure" breeding that may be needed to save the overall species. Like I said before, even the "UK Royal Family" realized it would never survive without a little "genetic diversity." Thus, Princess Diana, Princess Catherine, etc. etc.
What I would *not* want is for any of this outcrossing to result in a brand new species. No more "Doodleman Pinschers"

If the "ourcrossers" can guarantee that, then I'll reconsider.
I think we are on the same side here: to the betterment of the breed.
Not to beat a dead horse, but
As I understand it, careful outcrossing to reduce DCM then back breeding to "pure enough doberman" is how to do so.
As
@Ravenbird has mentioned its been done with dalmations, and
How its being discussed and done in other breeds, brittany's, goldens, labs, GSDs etc to address health issues from over-in-breeding there.
Careful outcross/back cross (or however you define the terms as to process- someone help me out here) is NOT the same as designer dogs.
In Service Dog forums and some of the literature, careful cross and outbreeding is done to improve temperament, sociabilty etc.
Its functional breeding to a set of characteristics. Just as show dog breeders focus on conformation and current judging preferences, or working or sport dog breeders seek drive, nerve, bite, agility, speed whatever- its form follows function.
I'm intrigued by the doberman as one of a few breeds that "can do it all" for my needs, and if the definition of improved longevity and better heart health to get that is part of the "standard" as well as good looks and working ability, that just makes practical sense to me.
If you invest in quality anything, one desireable aspect is longer life to improve the ROI on the higher cost.
That it also happens to be in the dogs best interest is a plus if not a priority...
Its not a zero sum game.
The devil is in the details, of course...so I'm eagerly awaiting more info on the plan and process by FKC, as blessed by German Kennel Club.
In contrast to the US based informal Disappearing Doberman Project that has since halted due to "economic reasons"
A non-doberman is bred to a doberman to produce the first generation ("F1") outcross litter An F1 dog is bred to a doberman to produce the second generation ("F2") and first backcross litter...
www.dobermanpreservationproject.com
In the end, this FKC effort is all by itself cracking open the conversation as a counterpoint to the "we still have room to line breed still"
and perhaps another roadmap to success,
Certainly IMHO better vs "shrug" and dismissed as the sort of "not invented here, not gonna talk about it, just get me another dog" kind of mindset thats understandable short-term but not sustainable long term in the face of facts.
Its a win win if properly framed, if we can agree on what we agree upon vs quibble on the smaller subset of that we disagree on.