There are no factual numbers of what was promised, so in the end it will still all come down to what a person thinks of it for their own.
I think 3 variations per animal would be enough, while somebody else would say: no 12!
Three would be absolutely enough for me. Okay, maybe the llamas and flamingos could need 5 or something like that, but tigres and lions and such? Light, medium and dark shade and I'm fine with it. It's the animals that live in bigger groups, where the lack of variation lets me cringe.
I don't think "in a large batch" means all at once, though. Maybe four or five batches? Wouldn't count on the all at once update, but in the end, it doesn't matter too much. Still think that it was a bad decision to not include feedback in paidcontent right from the start. People who not followthe forums or social media regularly don't even know they are working on something. So what they think is "onlywhite llamas? That's cheap, not worth buying."