It's been a while since I revisited the FnaF indie scene since the FnaA age of things so far this project is the best one scope wise.
The game, as the community knows it, is practically the same as the vanilla in a way that accomplishes its own goal and I personally think that taking this approach isn't going to end in a fulfilling result. Now I'm not saying to strip the gameplay, but rather introduce the opportunities to have risqué scenes between the gameplay and balance the difficulty to fit your definition of an end-goal.
An easy start to introduce the soft curve in difficulty may be to ease the player into using different set pieces that work around the main crew's threat. Set pieces like the glory holes in the bathrooms could be used for the security doors for a personalized oral scene/ a combined job or giving camera attention to certain spots to create reactions out of the animatronics. A give and take system that is both in tune the original game and your end goals.
Last big note on my understanding on the character designs, they're not unique as they could be. The lack of variety of body types really dampens the player expectations of the types of scenes that play out as another animatronic could simply fulfill the same job. Other than Freddy's thighs and Foxy's hermaphrodite traits, nothing strikes out as a fan favorite. Perhaps a practice of mixing different traits could make your version of the animatronics memorable rather than following FnaA's example.
Sorry for ranting but I really wanted to see a complete remaster pull off something better than we got for the last few years