Viv and Jackson are going to be a couple.
I hope they are not going to be a couple, because they are much better as friends and I am tired of almost every male-female friendship having to become a romance in TV and movies. I also have not seen any indication of sexual attraction between them--any hugging or other touching has been for comfort, reassurance, or celebration of friendship (in my mind).
I do like the story of Jackson's desperate reaction to the pressure he was under and his relationship with his non-bio mom and his reassurance to her. Normally I don't like jock / alpha male characters, but he is my favorite character next to Maeve. Actually, I wouldn't mind seeing them get back together.
This season was overall much sadder than the first season, though there were still plenty of hilarious bits. It also seemed to have more unrealistic bits than the first season, such as the Romeo and Juliet musical (I agree with @DoctorAtomic that a real high school, at least in the US, would not allow such a racy production) and the apparent casualness and comfort that many of the kids have with different forms of sexuality (their own and others). Of course, I am the age of these kids' grandmothers, so maybe this is really the way things are now, or the way things are in England and other European countries--but it doesn't seem consistent with the many U.S. reports of bullying and attempted or completed suicide of bisexual, gay, lesbian, and trans teens, not to mention of girls who have sex with boys and then are called promiscuous.
Although I agree with @ShortyMac about loving the solidarity of the girls with Aimee, it seemed unrealistic that all these girls from very different social groups and with very different personality types in high school would bond this way. But I'm willing to handwave that because I love Girl Power.
Perhaps most unrealistic to me was the idea of Adam running to the school to openly declare his love (or at least his desire to hold Eric's hand) on stage in the middle of the performance. That simply does not track with his personality and actions throughout the series. I could see his mother's words inspiring him to express his feeling to Eric privately, but not to do something that could humiliate him so publicly. I feel sorry for Adam and how his father treats him, but like @VagueDisclaimer I hate seeing a romantic relationship coming out of a bullying relationship, at least not without a lot more apologetic work done by Adam. I also just don't see why Eric is so attracted to Adam, and it didn't look to me like Eric was so much happier with him than he was with Rahim. Eric and Rahim seemed to have fun together, and Rahim was considerate, patient, and understanding. Rahim was Eric's boyfriend, and Eric just publicly humiliated him by accepting Adam's request to hold hands (and, presumably, become a couple). The whole way this played out just makes me not like either Eric or Adam, and certainly not as a couple.