We were just talking last week about why Dolores doesn't simply modify Teddy's personality to make a more suitable partner and guessed that, maybe, she doesn't want to be hypocritical like that. We guessed wrong... and not just that. Instead of simply boosting his stats, like we imagined, she appears to be uploading traumatic memories to him to try to "awaken" him in the same way that she's awake.
This also seems to throw out the theory that she eventually discards him because she feels betrayed by him. Apparently, she didn't take his disobedience personally at all. It seems that it was a test, to see if he had the ruthlessness to kill a defenseless person, and the fact that he didn't helped to make up her mind about modifying his personality. From now on, we may see a different, ruthless Teddy that we haven't seen yet, which is exciting.
It's also kind of funny that we were complaining about Maeve last week and, now, there are two Maeves. Seriously, I'm not sure that I'm a fan of her having even greater host-controlling powers than she already had, being able to control them with merely her thoughts. Even though it makes perfect technical sense, since computers communicate wirelessly all of the time, it still feels too much like magic in this context. I'm afraid that the writers are going to use it to get out of a lot more jams and then make it conveniently stop working when it's too powerful and some drama is needed (like how she couldn't utter voice commands for much of this episode).