Well, regardless of how people feel about it (and looking at the reaction, the nicests way to describe it is "mixed", I guess, although I do know there's a few others that appreciate a 'natural' look, and as long as things are optional, everyone should be happy), I think the impact is a lot bigger than people imagine.
Even if they start to grow it out now (that's assuming they trimmed at all instead of being hirsutulous begin with), I'd have to render out bushed and regular versions of every scene where they're naked, do the post processing work twice, add a big layer of complication to the transforms to track the choice and make sure it displays the preference, etc. And then we're not even talking about an option where one grows it out and the other doesn't.
But that's not what I dread most, it's when there's an upskirt and I'd need to make it stick out the sides and/or top but not poke through the fabric like a hedgehog tied in a silk handkerchief. I'm not sure if that's even doable, but I'd be a lot of work for one version of one short shot.
All in all, it's a lot of work for a single, optional fetish, so it's probably not going to happen, I'm sorry to say.