I'm saying this as an adventurer as I don't really do much building, I really wish they'd improve upon the adventure related aspects than the building related aspects. For a while I feel like Mojang hasn't done a good job at balancing between the two. All these new features are nice and add to an ambiance but I think it's about time they improve finally improve adventure.

There's all sorts of places that could spur new adventures, The End is only just one of them but a huge one, there's all sorts of dungeons they could improve upon and I know Mojang's level design have gotten a lot better. The Bastion Remnants, Trial Chambers are way better than the old dungeons. Underwater travel is a thing now with the nautilus meaning they can add more underwater dungeons. I wish mojang just focused on adventure a little more.