I assume that the current vagina model is part of the body model similar to YL1. And the penis or should I say where it connects with the body, albeit separated from the body model, still looks decent. But the separated anus looks like a huge downgrade from YL1. Not only does it looks worse than the anus in the prequel, it doesn't feels as fitted to the body as the current vagina and penis either.
And in case it will not happen, May I ask why? Because considering how well the anus interacts in YL1, it would be a shame not to implement it in YL2.