In interviews, GOT title designers Angus Wall and Kirk Shintani of Elastic have revealed that the new approach to the opening credits was much more motivated by practicality than any sort of Easter egg hunt. It's been an intentionally badly kept secret that the credits' clockwork Westeros isn't just for show. It's also supposed to tell viewers where the action for each episode will be taking place and what each weird fantasy place is called (a much more clever solution than the original bird map of the pilot).
But that has become a much less pressing issue in Season 8, what with globetrotting being kept to a minimum due to the handful of remaining characters being clustered into only a few locations. So Elastic was given free reigns to just go nuts. And they did, using some of that $100 million budget to create the kind of detailed, zoomed-in spectacle they've wanted to do since Season 1. They even created a virtual human to make sure all the little buildings were perfectly to scale, and we assume they then had a virtual Jaime Lannister push them off the tallest one to leave no witnesses.
But it's not just all big-budget theatrics. Getting into the guts of the diorama also allowed the designers to get into the guts of the story. It's no coincidence that the more in-depth sequences are the real places of power and story in Game Of Thrones: the broken Wall, the Stark tombs, and the Iron Throne room. Zooming into those on the map is supposed to make things "more intimate," says Shintani, who always wanted to focus on "the places that have the most emotion resonance."