We have decided to omit SOPHIA because she is the most complicated character in SMBC and it would take a long time to get her working in SRS. We feel our time is better spent on balancing the characters and finishing the game. It is possible we could add her and other characters as DLC after the game is released.
We decided to add a stretch goal for our Eve VII, our character based on SOPHIA III. If we the goal, we will add Eve VII to the main game.