Thank you for your excitement about our project! And dang, that's a lot! Some of which is certainly going in the ideas file! When brainstorming the endless mode with the team, we did think up a lot of new tests, one of which you even specified (The owner call), but we don't want to have too many tests. We are trying to think of a balanced way, to make some tests unnecessary for some dolls / make them faster / have an option to skip them and some ideas are being formed. As for the doll anomalies, any idea goes! So thank you! You can expect credit for the ideas that do end up in the game.
Here is a rough idea of how the endless mode anomalies will work: They are called events. You will have a screen, where you can see all events in the game, but they will be locked and named "???" if you haven't witness the event. The dolls are random, but they have stats, on which they work off of regarding the events they may trigger. Just like in the story mode, there are both ordinary and possessed dolls, but the possessed ones are not always evil. Sometimes they are even nice, playful or down right heroic. Once you have all the events, the game will continue, but the events will repeat. Some events however do have sub-alternation, so that it's not exactly the same every time. Like visuals, sounds and other side aspects of the event can be altered, to drag out the uniqueness of each run. I can't say much about the endless mode, as I don't want to spoil anything until ready (plus it can always be completely scrapped and reworked).
Until then, thank you for your suggestions! They have not gone unnoticed and I appreciate your time!