It's strange to me that the new legendaries are weak to the type you'd think would correspond to their game. Solgaleo is weak to Fire, Lunala is quad weak to Dark. That had to be intentional.
From what I've seen of the region, it looks to be a lot more detailed/expansive than how Kalos looked. Rather than simple routes it actually looked like, from the few clips I saw, a world that I'd want to explore every nook and cranny of.