A couple ideas i've come up with so far. Let me know which ones you support!
easy to make:
- some sort of categorization for contacts, to easily distinguish your favorites from others
- option for your workers to only have safe sex to decrease chance of stds (for less money?)
- some sort of apply all / "default" button for consumables, appearance, toys, etc (quality of life)
- adjust schedule/appearance/toys of sissies not in dungeon, once sufficiently brainwashed
harder to make:
- facial expressions
- animation for putting on condom
- sissies can use vibrator during sex
- start dating one of your sissies (more control over them without being in the dungeon)
- animated changing positions