Theres a lot more to it than that. If it was just that, then this wouldn't be as good as it is. The writing and dialogue are what really gives the weight and attraction to all the very simple sex scenes. Thats why its so good. Take that away and they're just loops like anything you can find on R34. They're not special anymore, without the context and story.
Its not like, an amazing story, its not the best thing ever, don't get me wrong, but its decent, and if they just forced it, it wouldn't be decent, it would be kinda just like: "Oh ok whatever"
I get that and I don't blame you, and they really should stop making promises they wont keep, but I'd like to maintain the benefit of the doubt and assume they just don't want to let everyone down, and want to make sure they've got it all right before they release updates. Fingers crossed its that, and not just laziness and greed, but considering how much passion they've put in the project this far, I'm willing to bet its the former.