in order to enable sustainable meat-based diets requires some out of the box thinking.
Disregard all of this if you were, in fact, suggesting plant-based meat-based diets.
.
Why are you talking about the sustainability of omnivorous diets as an objective for out-of-the-box thinking in a vegan community? It reads as a tacit endorsement of carnism, and therefore omni apologia and advocating violence against animals; both of which are against the rules of this community.
It doesn't matter whether omnivorous diets are sustainable or not. That point is a more peripheral concern to the concern that meat-based diets are categorically unethical and evil, besides the situations wherein we need to caveat and prioritise a basic and acceptable quality of life and/or our survival.
You should be wanting the exact opposite of "enabling [sustainable] meat-based diets". "Sustainable" and "meat-based" (= conscientious omnivorism) should be A) inherently contradictory, besides the fact that B) it's unsustainable.
A) Endorsement of a meat-based diet is in direct contradiction with our high regard for sustainability.
I remind you that the reason we care about the environment is that sentient animals, including ourselves, live within it. The biotic community- the entire ecological community - is not important without the necessary ingredient of sentience. You should first and foremost care for the environment only insofar the reason that sentient beings live within the environment, and that the environment gives us the inexplicable value of the life that lives. In this way, our value for self and other is foundational for our high regard for the environment. (As an aside, sentience outside of the animal kingdom is plausible, but that's a different discussion.) I remind you of this, because your high regard for sustainability seems divorced from the understanding that the reason we value the environment is because there is something foundational we value in it.
As an aside, not that I believe the next part, as that would be uncharitable, but the only way for a high regard for sustainability to be compatible with endorsing meat-based diets is if you had an anthropocentric or selfish world view that only benefitted your in-group (excluding non-human animals and additionally not including all humans), or that only benefitted yourself.
B) You can't get sustainable omnivorism. That's a discussion for another time, if it even needs discussing.
tl;dr: Enabling sustainable meat-based diets is missing the point. It's like endorsing welfarism instead of abolitionism in a vegan community.
I'm sorry for misunderstanding.
Can I ask though, did I read your non-veganism correctly? Your point about enabling sustainable meat-based diets seemed inherently non-vegan to me, which I wouldn't expect to see from a vegan.