Bran's arc has always been less satisfying to me than the others. So now we see that he can observe the past while still hearing what's happening in the present and can influence past events, since people there can hear him. That opens up all the usual time travel paradoxes. For example, why can't Bran go back to the day he saw Cersei and Jaime and prevent his younger self from climbing up the wall and getting pushed by Jaime? Or is that prohibited by the rules of warging or whatever?
I prefer the story lines that focus on conflict, intrigue, politics, and so on, even if they involve supernatural powers like Dany's flame and heat-proofing. To me, that's the essence of the Game of Thrones. It's great, for example, to see Sansa grow into a sophisticated player in that world.