Yeah there's definitely a lot of room to create amazing scenarios... Hopefully Ikeda-san keeps working on this game with future content updates for scenarios. Would be great to try and not be caught with the other girls... or even be caught and have reactions from strangers.
Would it be in bad faith to ask for this. I mean it doesn't necessarily have to be whole lot of content. (Since it's pretty much just dialogue and asset use)
For Mizuki/Kagami, their neighbors could just knock on the door with dialogue to keep it down in there. The embarassment would end the sex right there.
Then after repeating the racket a few times under the "suspicion meter". Kagami or Mizuki finally come to complain but seeing the MC will cause you to unlock a threesome with them.
Akari sees MC go into the Candyshop and leaves late. Suzuka decides to visit the store for more camp food, and sees MC with Kanae walking down the alley between the store into the love hotel.
And since you can sneak into Kanae's place. You can just do quiet sex under the "suspicion meter" against her terrible husband.
All this while using the Mechanic would make it pretty believable and avoidable. Just like last games threesome requirements.