It's just that it's a sort of thing that's best done at a world reset, so please don't forget about it when you prepare the next one

If the concern is accelerating q growth too much, you can always scale back randomization range when generating a new animal. And if it doesn't do anything, at least you'll have an aesthetically superior breeding method.
I was also considering proposing diploid genome, with dominant and recessive genes and all that jazz which I think would make for an even more interesting breeding, but that might get a bit too convoluted for the end user.