I think you are thinking too deeply on the art meaning. I am not a art major so maybe my uncultured mind can't see the art in porn but all the poses I seen are pretty common in hiding/cheating genre of games. Maybe in Netori games you are always playing the Satyr but nothing about this game seem that special or deep meaning.
As for Chiho's new look. It is honesty so different from what we know it is off-putting but my main issue is only with Chiho's standing picture because it reminds so much of this:
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The images of her sex poses are fine. Maybe the original's Chiho's ass to thigh ratio was so unrealistic now the new artist wants a more realistic thigh ratio to match Chiho's big ass?
For the dress I actually like the tight jeans look. It gives her a more modern woman look instead of the traditional housewife. But if you like the long skirt then don't worry the earlier progress report said Chiho will have multiple outfits.
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Chiho's new look is just a personal preference. I personally don't care too much because Tiramisu will give us the original game he promised. I don't care if he is okay with Critical Bless remaking his game into something that does not resemble the original. If you don't like her new look there is completed original game included with DX. Or since Critical Bless said they may support the game with other addons after release, if everyone hates new Chiho they can just add a DLC to switch to Chiho's old model in DX. Wow I think I figured out their sale strategy! Make the character look controversial on release so they can sell a DLC later to restore the old look! Those devious bastards!