Just finished watching this as well, and while it was enjoyable, found the whole thing to be a little empty. You basically knew the whole thing was in her mind the whole time, and it was just a matter of time before it all stopped and she went back into the real world. It's just hard to care about characters like the kids and such when you know they are not real.
Think the most intriguing part was the reveal of Agatha, but even that wasn't really fleshed out and her character didn't do much overall. Then it felt rather rushed at the end, with no real pay off.
Whole show just felt like an intermittence between the movies, with a little bit of fleshing out of Wanda's character and power.