The part where she rewrote Vision's suspicions was particularly unsettling in its implications. Either he really is just another fictional character for her to do with as she likes, or else she's casually mind-controlling him.
I don't think he's just a "fictional character" because otherwise Wanda would have been able to write him in such a way as to never become suspicious of the unreality of his situation. I think he's a real being, and that's why she's having to rewind / redo things in an effort to keep him from getting suspicious.
If I understand correctly, he wanted a normal life / relationship with her. He didn't get that thanks to Thanos. So now Wanda is trying to give him that opportunity but is keeping him in the dark about the fact it's all fake.
Now that we know it's not all in Wanda's head but is happening in the physical world, we now need to figure out whether Westview is more like the Truman Show, with actors pretending to be Vision's friends and neighbors, or more like a Delos park, with Wanda trying to stop Vision (and everyone else) from figuring out that they're robots. Or something.
In short, I'm hooked too and can't wait for the big reveal!
I'm also wondering if maybe the other people in Westview are all real people that Wanda has "kidnapped" and that, at some stage, her magic is going to affect them and turn most / all of them into a new crop of superheroes / villains ... perhaps creating the multiverse of madness in the process!