I don't think the devs read this thread. Neither of them have accounts on this site either. There's no way to email or contact them either sadly except for commenting on a patreon post for the bug testing builds. That's literally the only way I'm pretty sure.I know the developers read this thread, so clarification why they removed it and if they ever plan to change it would be nice.
Maybe someone can mod it back in to the main version, but that always might cause issues with how much this game patches.
So the new game updates wouldn't affect a mod at all since the changes would only be to book 1, so that's not an issue.I think it'd be possible to "mod" the scenes back in just by extracting images and replacing them so they only affect the small breast scroll option. However, it'd be nice if they'd just give this option officially.
5 hours until 0.4 is downloaded and if that has even more art, I'll post it to mega for you Maim. Maybe you can figure something out, since you probably know more about how Renpy works than me. =)
To make a mod with the old art, you would need to replace the base images that have no tits in the current version with the original loli tits base images, then replace all the small tits overlay images in the current version with a blank transparent image.
However some of the art might not match up perfectly with the old loli tits base images, so other images may have to be replaced as well with the old art. So it'd be a bit tedious to make, and all the scenes would have to be checked to make sure the images match up with the old loli tits base images.