No real twists here, just revealing what we speculated on all along. So pretty much Bernard = Arnold. This wasn't the shock that we had in Episode 6, not because we didn't guess that Bernard was a host, but because we saw Ford for what he really was, and making Bernard kill like he did.
The maze is as I suspected, just a metaphor for the hosts gaining consiousness. The missing part of the bicameral mind theory. The layers as explained were Memory, Improvisation, Self Interest, and the top level was blank. I believe the top level is self awareness. The hosts understand who they really are, and wanting freedom.
The most interesting reveal of the episode to me is that the "incident" that happened 35 years ago, was Dolores killing Bernard. I had thought it would be Dolores killing Logan as the method of the self interest part of the bicameral mind theory, but it is Dolores killing her creator.
Another interesting bit to me is that I had originally speculated that Arnold build Bernard, as an experiment of him trying to achieve life after death. I had thought that the memory of the death of Bernard's son was actually Arnold's son , and that motivated Bernard to as Ford put it in the first episode "raise Lazarus". Well we now know that Ford indeed built Bernard and the timing of the incident would make it impossible for anyone other than Ford to have built Bernard. As we can see a slightly younger Ford perhaps 10-15 years earlier, or perhaps even earlier, after all Elise said Bernard had "been there forever". However it's becoming clear that Arnold was simply smarter than Ford and better. Thus Ford had to use the code that Arnold created in Bernard, and Bernard is self aware of it.
One other thing, the extent of Mav's power is equal only to Ford, and perhaps greater. We learned back in the episode where Bernard finds the off grid hosts of Ford's family that they only responded to the voice commands of Ford. We also know that Bernard seemingly only responded to Ford's commands as well. Now that we've seen Mav control Bernard, it's safe to assume that she has an equal command over the hosts that Ford does.
With one caveat....
Bernard tells of Ford having a back door, to controlling the host in shutting down Clementine. Perhaps that back door could also effect Mav.
My favorite part of the episode however, involved the story of William and Logan, and the resolution to this is what I most look forward to in the finale. We now see how William finally becomes the man in black. We saw small glimpses last week. Did William finish off the dying bandit by the stream? But this time he went on his first full on murderous rampage, which is why I also believe the connections of William to Teddy were also confirmed in this episode. We had thought Teddy to be the white knight, when now we see from his forgotten history that he commits mass murder.
That's what I love about this show. Just as we think we have all the mysteries in this show wrapped up, another one pops up.