I'm in the camp of enjoyed it, and in the camp of liking both Hopper and Joyce's characters. They're both products of their time that have experienced deep emotional trauma and it shows. I like it well enough.
This season did feel more polished/whimsical in a lot of areas versus the steady theme of serious/gritty 80's sci-fi, but I think the varying tone helped create good narrative juxtaposition between scenes.
I also think it helped capture the running theme of an ongoing DnD campaign and how even though different campaigns can be related to each other, they also take on a theme of their own.
I feel the DnD elements in this show remain strong from season to season, which is an important, fun thing for me.
I don't think I have any spoilers, trying to speak in general terms until some time has passed.