Had to look up which one she was as I only ever saw the first few episodes of
Stranger Things.
^-^ Cute girl. I think overall I liked her character in this one, although there were moments I felt compelled to roll my eyes and be like "really?" with hers and some other characters' dialogues, thinking they were having unrealistic reactions to some situations and things said by characters they were sharing the scene with.
Overall, I'd say this is an improvement. Maybe a 6 out of 10, which is at least okay in my eyes, although for the first 30 to 45 minutes or so I was dreading this would turn out to be even worse than part 1.

But then the story and the method with which the heroes decided they must take down the killer made more sense this time than part 1, and there was even a very pleasant surprise with one character the movie made out to be seemingly as gross and obnoxious as possible in the way that only slasher films would do, but then the story kept her around long enough to have her make something of a heel-face turn and show some humanity and realness, even kind of giving an explanation for why she was the way she was at first, and it didn't seem forced or contrived. When you can legitimately have me rooting for a character to survive and triumph after going through an arc in which she started off causing me to groan and roll my eyes, you've done something good as a writer.
^-^
I will say this, though; exercise personal discernment with watching part 2, sir. It is quite shocking and gruesome with some of the death sequences. But somehow I think they were trying to only be legit horrifying rather than just tasteless in the so-doing.