What Nintendo is doing with Zelda is none other than giving in to market trends, i.e. westernizing the franchise. I'm refering to the sheer scope of the world, not the fact that it might be non-linear. It's not logistically possible to fill the entire game world with substantial content, meaning there will be downplay as you travel from point A to B, similar to Wind Waker but made worse due to longer stretches of empty space. That's why they added the 2x wind sail item in WW HD, to mitigate downtime, but it's only a patch solution and doesn't solve the root of the problem.
As far as Xenoblade, Nintendo specifically brought in Monolith because they needed an open world game in their library, sadly this is what sells systems these days. JRPGs have never really had level design and puzzles in the same vein as a Nintendo game, only Golden Sun lives up to Nintendo quality standards of gameplay outside of combat. I love Xenoblade Chronicles, but outside of combat (which is fantastic) we are talking about pretty landscapes with no gameplay interaction of any kind. Those games are played for their immersive worlds, stories and characters, so it makes more sense for that type of game.
This isn't new though. Like, all these years discussing Zelda here and all the posters who are skeptical towards Zelda U, do you just dismiss them for fanboy drivel or something? It's weird that I even have to explain this when we've been through this 1000 times.