Sorry if I'm being overly critical, but while this is actually pretty good, I get a very distinct feeling that the dev severely underestimated what kind of game they were making and is now only working down a checklist of all the scene permutations that a game like this requires.
This is still really early in development, so I don't expect fully fleshed out scenes for every possible situation, but the characters all react pretty much the same to whatever transformation you apply. One will literally say nice cock/tits/ass, one will think, I wonder what my X would look like if I drank that potion, and one will wonder how much further your X might grow in the future.
When you go to the brothel and have the futa girl there drink a potion, there's only one alternate sex scene, the one where her cock gets even bigger. With the other potions the girl will only admire herself, say she wishes she could be even bigger, and maybe the MC will grope her a bit, end scene. Other than that, absolutely no differences, and I tried every potion on both of them, which by the way is already 16 permutations of each render everytime the relevant body parts of both characters are on the screen, 20 when the MC didn't drink a potion herself.
Besides that, there's one alternate sex scene if the MC has a dick, one non-generic comment when she has a big butt, one dev note that a futa mc on futa girl scene will be added in the future, and I think that was it in terms of actual differences that the transformations make. The shrinking and lactation potions aren't even being used by the way.
Also, I didn't write this as a review because it's just the way I felt while playing. It's not meant as a comprehensive review of the entire game. There's actually an okay amount of scenes in the game. I was only talking about the permutations of the transformation system. Can't really say anything objectively bad about it.