I'm glad they get that start over with quickly in The Choice, they know you're here to see Adam, so they get right to it.

We get a fair bit more expositing of Adam's motivations, but here we can see how it actually affects Eleven, we can see that, well, it's not that Adam's right, but he does have some point. He was also a companion briefly, but he got completely left behind, never cared for, never checked up on. The Doctor can claim to not have favourites but he at least has some he cares less for (at least, you can see how Adam gets that).

And all that comes to a head with a spectacular cliffhanger. The spread of all the companions in cells is lovely, and Adam making Eleven choose just one to save is just a brilliant final moment