As much as I loved S4, I feel like Duffer brothers need to stop adding characters in the show. Because at this point so many of the og cast barely gets enough screen time and storyline. For example, I felt like the character Argyle added nothing but comedic scenes for the show, while Jonathan's character was reduced to smoking pots. Also Mike's character felt very insufficient.
And another thing that I didn’t like is the whole Steve-Nancy-Jonathan triangle. It was cute till s2. Steve is my absolute favourite but he and Nancy broke up. And Nancy is a smart girl. It feels like a disservice to her character to throw her like a ping pong ball from Steve to Jonathan like 2010's YA book trope.
Another thing that has me worried is the possible Eleven-Mike-Will triangle. I really really want Will to get a BF but please don't let it be Mike. Mike and Eleven has been through so much and they are so wholesome, it'll be a travesty to break them up. We romantics need some endgame couple and Mileven is that for us.