Here is my dumb conjecture based on the symbolism and little evidence. Really like the whole religious overtones, fits really well with the nature of the show.
1.) Delores is Eve, oldest woman, first to be able to use knowledge without breaking down (The others could kind of disobey their programing but they went to shit because of it.)
2.) Man in Black (Ed Harris) is the devil. I don't think he raped Delores in the barn (Well, I think he mind raped her). I think he did something to stabilize her so she could act on her new programing. Serpent in the Garden and all. I think Harris might be an old employee who left thirty years ago when shit went down--with the advanced medical technology they have, him changing his face/identity to sneak in and keep an eye on what happened is plausible.
3.) Obviously Ford is God. Very powerful being who Bernard things can't make mistakes, and so what does he do? Creates a bunch of inferior beings who can't retain knowledge and exist in a curated 'garden' that he watches down from. I think something happened thirty years ago that hammered home despite humans curing all disease and having super tech, people still die (He lost someone close ect). I think him and management then decided to try and not just make puppets that entertain people, but 'perfect beings' that could either replace humans (And not experience death) or hold human consciousness, but something about this process is really twisted and he wishes he could go back to the puppets like the dude he was talking to at the start.
This is why that writer guy said it didn't make sense they kept updating, as a park its better of the hosts aren't quite so real. And also why he said Ford is chasing his demons. And lastly why it seems like parts of the park/station they are on aren't being upkept, because they are having budget issues from whatever that project is. Man in Black knows Ford is trying for X thing and is looking to stop him, steal it or use it, devil rebelling against god. (Humans are kind of like angels, in a sense, they come from the place "God" lives (Heaven), say cryptic shit the hosts don't understand, can perform what would be miracles to the hosts (Bring them back to life, make them pass out, mind control ect))
Anyway, probably completely wrong. But I think management and Ford are pushing for more and more lifelike because they need the hosts to be able to well, host a human consciousness (Or its the reverse, hosts are made by flashing a human consciousness that's dying, and the work they do is essentially trying to get them perfected so they can recall their memories, which is why they keep even in the broken one's). Like Is said, probably dumb, but I can't wait to see where the show goes.