It would be so cool if Darcy Lewis pieces together the puzzle by just watching the episodes as we the audience are, and then brings the material we have to the SWORD higher ups to convince them to do this or that. Maybe revealing she's seen or connected something the audience haven't but the pieces were all there.
So, so far we got:
Wanda: She's in control, but not fully. She definitely wants to keep up the illusion and want no third parties to play a part in it. She might actually be the villain, having taken everybody hostage for her own gain.
Vision: Is aware something's not right, and keeps doubting stuff. He has some form of self-control. Might believe everything's real still, as Wanda keeps rewinding or cutting whenever he questions something.
Agnes: The nosy neighbor who tries hard being Wanda's best friend. Trying to push Wanda against Dottie, and not liking Monica one bit. She's aware of everything's that's going on, and might possibly be the right-hand for some evil force. Maybe a coven of witches who would try to get children out of her. To make a trade. Speculation on comic book runs.
Westview: It's definitely a real town taken hostage by Wanda. Some citizens are well aware of the situation and is playing along, others might possibly be forced to follow a script around her. They might all be SWORD agents.
SWORD: Trying to reach Wanda, monitoring her. Monica trying to become Wanda's best friend. Blending in with the script, maybe testing her limits with the Ultron call-back.
FBI: Jimmy Woo is an FBI agent and they're trying to reach Wanda, thinking somebody else is doing this to Wanda. Might be cooperating with SWORD or competing with them to get to her first.
Other entities could be Hydra, AIM, Grim Reaper, Mephisto etc. One thing, I don't think they would introduce one big new organization (SWORD) and re-introduce another big one (AIM) in the same show. Show is already gonna get weird as hell.