Familiar mode wasn't what I was expecting, but it was a pretty fun romp for what it was. Shame about her losing the 'futa' bits, but the lithe bod getting smashed by the bartender almost makes up for it.
Although it's a bit strange to make it a costume regarding the tail rather than just biting the bullet and go full/partial catgirl. Maybe that'll be the alchemical uber mode later on when the rest of the art manifests.
As others have mentioned, there's a pretty functional free use and slave path already there, so this strikes as playing it a bit too 'safe' while not really diverging a whole lot from what is already present.
The little flavor nods like the cg busts of sparkle bouncing briefly in certain states was a nice touch. You can tell where the dialogue has been tweaked in the early game, to a degree - it's actually quite good and makes Kayden consideribly more palletable. (Not enough that I wouldn't mind seeing him stuck as a boi or a girl servicing Roompah and Harmony, though.)
Roompah swapping roles or joining the player as free use also sounds fun, but really, that ship has probably sailed. Bottom line, enjoyed the update, and certainly looking forward to more content in the future.