Well, I do recall Ocean saying that they were throuples rather than just cheating or having two separate girls like a mini harem. Ocean's against harems, probably thinks they're lazy writing because they ignore the NTR aspect - non of the LI's really notice or care that you're banging everyone else etc. So by calling them throuples, they're inherent polyamory - so the girls will be aware of your sexual history with each other, they will know if you're spending more time with the other, and they will interact. Whether or not all throuples are equal triangles is unknown, some might have unequal power dynamics (such as any with Vanessa and Bella I think) while ones with say Vic, Nia and Nami might be far less tense and more open minded.
Regarding Nika, he still needs to deal with his mental block regarding intimacy. Intimacy for him can trigger panic attacks (like with the four way kiss in retrospect), so it's not just the mental block of being aroused, he has to deal with why he's having panic attacks. Hyperventilating while getting it on is probably less sexy for the LI's. So there's still a long way to go. I honestly don't want it rushed just to get to sexy times: Ocean could have added sexy times in season 1 if he's going to rush Nika's healing just to get to sex scenes quicker. The healing aspect is important to the story despite people thinking he's impotent and it's wasting their time. I'll hope Ocean initially shows Nika trying to force himself to be normal and getting freaked out and then the LI comforting him, stuff like that. A lot more meaningful in my opinion.
Yeah, she's pretty open minded when it comes to happiness. The way she decided Mila wanted to be kissed and misread the situation is pretty cute. I'm sure she'll initiate a heap of different situations. Her acceptance of Nia's job is more open minded than half of the people in this thread, and we're all perverts here right?