I hope one extra scene will be Allison and Veronica threesome scene.
I dunno about V, but I'm pretty sure Allie would never want this. Besides it would be a terrible pair if you ask me.
A threesome with the current girl/fuck buddy and the ex-wife sounds more like an incoming death sentence than a dream threesome for the MC to me, but it wouldn't make sense storywise for a lot of reasons for those two to suddenly join hands and jump on MC's dick, and extra scenes are voted by the devs supporters, so yeah, don't think many of them are too anxious to see a scene like that. Jasmine could be an option on the Allison path or for the extra scene tho.
As a noncanonical bonus scene for a future update, my money would be on a sex scene with Camille. It's not something I'd be looking forward to out of respect for my fictional bro Coop, but ppl've been asking for one with her more than a few times that I'd be surprised if there won't be any involving those two eventually, a solo sex scene or a threesome with Allison/Nat. Someone just needs to be brave enough and have a few extra bucks to spend on convincing the devs to join the dark side for a few mins, and it'll be done. What Coop doesn't know, won't hurt him.
Kalani and Allie would be a perfect pair for a threesome
Might be wrong about this, but since the game forces you to choose who to spend time with between the two of them, I don't think there's a potential threesome planned for these two either. Tiana's probably the only plus one on Kalani's path.
I still get the error in the elevator. It sends me back to the main menu. Anyone has a solution? Or will that be fixed?
If you load a certain old save and it does that, you can try to load others or, even better, start a new game and see if the issue persists. It's what I usually do whenever my saves get borked... spares you a lot of headaches in the long run, plus, the game's well worth playing again and again.