There is, actually, since I believe the intention is not about the ratio of her body to his body, and more about the ratio of her head to her body.
The proposed mod would leave her head-to-body ratio intact (ie. a natural appearance rather than a deformed appearance).
Fair enough. Is it possible to scale down all the offsets and re-position them?
Yes. It involves careful and somewhat-tedious work. The offset-adjustment stuff must be followed up by changes in non-obvious background code (such as calculations of penetration depth, because they make implicit assumptions about the size of the girl's mouth). The task is complicated by psychological factors - the modder
knows that he is doing this work in order to fulfill a sexual fantasy which he may consider taboo or objectionable.
Ha, as opposed to your implications of shotacon? I don't mean anything hostile by that, just that I fail to see the moral logic of "smaller male = more ok than smaller female."
There's no requirement for the slider to move
downwards from its default position. It would be inconvenient to do so, because the male character
lacks a head and shrinking him would tend to bring his weird unclothed neckless shoulders into view. The main goal would be to support a slider-based
increase in size.
The modder thinks to himself
"I am creating a mod in which a fully-grown adult woman performs fellatio on a larger-than-usual dude." The basic concept has been
done before.
Here's a more recent example of "woman has sex with something much larger than herself" which carries no implication of lolicon.
Player A could activate the mod and take it at face value:
"finally, my Slender Man blowjob simulator project can proceed!"
Player B could activate the mod, and sneakily decide
"the apparently-giant dude is actually a regular-sized dude, and the woman is smaller than usual." He then fiddles with the breast slider and hairstyle to create the appearance of a young woman. He can take further steps to reinforce the fantasy scenario, such as changing the scale of the background image or loading a custom dialogue file.