My suggestions would be:
1. Purchase of furniture and decorations, those can definitely increase Anon's mental, look nicer overall or even create more interactions with the bot and places to intercourse. And possibly sex toys and clothes for the bot. (Sudden idea: maybe a pet?)
2. When Anon goes outside, the locations could be displayed in form a map, and then you'd have to click on the locations.
There might be an option to visit "undiscovered part" of the city and unlock new locations. ( Work perfectly without a map but a map could provide some kind of "scanning minigame")
Tho, this map idea means mobile players will have an even harder time playing so I recommend this the least.
3. I "personally" like to see some options to interact with other characters like neighbours, mom or even landlord (either beside or a part of the main story)
4. I'm sure more sexual interactions during sex scene has been suggested many times (and definitely a part of the plan for the game) so I will not go into details.