Re Kali/Eight/Eleven's magic power sister.
I thought it was a bold choice to bring back Kali as part of this season. It was one of the big cliffhanger moments of season 5 volume 1. But... I don't think it worked.
If you work backwards from the ending, it makes sense why you have Kali. She has illusion powers so Eleven's fake out "I believe" ending can work. I like that ending. But what did Kali do during the series?
Well she convinces El the only way to end the cycle of monsters and torture is for them to die. And if you work backwards from that, that's why Hopper has his "the only solution is to die" moment earlier in the series. It's a parallel.
So Kali has a key purpose... But what does SHE actually do? They have another super powered person and she just wanders around until she dies.
I know she was a bit of a nihilist at that point on her life, but even as they're putting together the final plan, she doesn't have a part in that plan. Her death just doesn't matter.
Re Nancy Wheeler.
During the epilogue I believe all of these young adults have moved on. I believe Johnathan is an awkward filmmaker. I believe Steve coaches children. I believe Robin is just vibin in life. But I don't believe Nancy.
Nancy started this series as the "preppy" girl and ended it as Ripley/Rambo. Leaving college made sense. She obviously wanted to be a reporter, so jumping right into reporting makes sense. But even as she says she's happy about it... She isn't. And maybe that's part of her story. Maybe her story isn't over.
I think we needed something more of Nancy. Maybe we see her trying school and trying reporting, but she doesn't really feel at ease until discussing monsters with her friends, who seemingly have moved on.