First 10 hours of pure joy already. Almost all of "overworld" Primordia explored (except the unreachable heights, of course) and, despite doing [almost] only side-quests, I find traversing the world sooo funny and enjoyable: finding your way from one point to another, evading dangerous foes, jumping over rocky terrain (or climbing it), looting stuff, finding and watching scenic landscapes, managing your inventory and your FrontierNav Network and, of course, battling awesome desgined enemies, everything feels fresh and unique... And I have yet to start diving in the story (because, yeah... despite somehow "hidden", there's so mucho lore and stuff here...).
I played the original on Wii U until I got my Skell, invested some more hours and left it (never got the flying ability), and yet the game manages to feel so good again... And, oh boy, you can see how this title was so important for Breath of the Wild... All the basics of post-calamity Hyrule are here: the structure and "tricks" of the terrain, the key points that unlock info about the surroundings, the environment interactions...
I understand how this game can feel intimidating for some people, there are so many systems and so many information to get used to that can feel pretty overwhelming, specially in the first hours... But the depth and enjoyment its mechanics and world provide are over-the-top. Just have to jump into it with time and patience! =D