No, they show there's a difference in genre.

You seem to mistake genre-differences as 'ambition' in this thread. Why would weapon crafting, parties and character customization at all be relevant. You have a Zelda avatar, so you should know Zelda is not an RPG. I don't see how stylistic design choices have anything to do with it either, especially since to me the style that at a glance would look simpler, Zelda's, actually looks like much more fine thought went into it and as such is much more subtly detailed.

"More realistic graphics" : Subjective, and at any rate inconsequential. Why do 'realistic' graphics make a game ambitious, or better?

"Full voice acting": Not sure if you played the previous title, but voice acting in and of itself, says nothing. It will probably be bad voice acting. And why is voice acting a sign of an ambitious game again? Is this 1995? Soul Reaver was released in 1999 and it will most probably still have better voice acting than the new Xenoblade.

"Few Loading screens" : When was the last time a Zelda game had loading screens, huh? If anything, Zelda games have always relied on exploring the game world with as few interruptions as possible.

"Online Multiplayer" : Do all games need to have online multiplayer? Would it work with Zelda? Or do you merely want to see features that make no sense on titles that have no pressing need to have them?

"Fully accessible massive world with day/night and dynamic weather" : I thought you were describing Ocarina of Time for a second here. Oh, wait. You are. No? I am confused now. Zelda games have always been pioneers of massive accessible worlds, the day/night system has been in place for a long time, and so has weather. Not sure what's the point here.

"Customization of party characters and vehicles" : Cosmetic customization makes a game more ambitious? You do know that customizing party characters has been a staple of videogames for so long, that it can not feasibly be seen as anything unique or ground-breaking? We've had these things since before Baldur's Gate you know.

"Armor and weapon crafting" : How would this benefit Zelda, which has never placed much focus on having several versions of the same weapon type? Zelda games have primarily relied on simplicity on this front, rather than a WRPG approach where you have to look into various weapon stats. This does not have a real place in Zelda. And also this feature has been around since well before Diablo I and II. Again, I am not sure what about this makes it 'ambitious'.

Realistic graphics is neither here nor there.

I also don't think it will be fully voice acted. And I think Zelda will also have no loading times.

The Xenoblade world might be a bit bigger but probably not in terms of actual content. RPGs get away with filling areas with just endless enemies. Zelda can't really do that as much because killing enemies isn't as important a means for advancement in Zelda. It's more about finding items and exploring and doing puzzles etc.

The obvious thing Zelda will do better is gameplay though. The gameplay in Xenoblade is fairly simple and quite uniform. Zelda games tend to do a lot of different things.

Don't know much about studio structure do you either that or you're playing dumb for the sake of your argument, Monolith has a few teams one of which helps out in other projects much like Intelligent Systems has a hand in the coding of engines and R&D in Nintendo, their activity has no bearing on the development team. Electricians working on an electrical system isn't going to delay a plumbing team doing their work because they're two different teams.

So what's LoZ Wii U going to do to compete with that? 

Your example is what lost me. Skyward Sword needed programming worked out, so they took programers. That would hinder development.

Xenoblade X is the far better game, however it might lack focus on and length of story and may suffer from even more stupid useless low quality fetch / kill side quests than its predecessor. Xenoblade Chronicles had 60+ hours of pure AAA storyline (without sidequests) but the story in Xenoblade X will be much shorter, however still comparable to an average Zelda game.

What Zelda will do better is the interaction with the environment (you can cut grass or dig holes). Xenoblade does not have that at all, the world does not feel as alive as it could. The music in Zelda will also be much better since the vocal tracks in X will not even come close to the AAA Xenoblade Wii soundtrack. Also the dungion solving elements are a plus for Zelda but the open world concept is a very high risk which could riun the game if done wrong, especially if the story becomes an unimportant side element like in Skyrim.

However, there has not been any good Zelda game since Ocarina of Time, all later entries were either too short (MM), to childish or had boring Midna sections which kept me from finishing any of them.

Xenoblade X will once again ask a lot of philosophical and moral questions and feature a very deep storyline which will provide a value and an impact to your life. Thus it will easily be the game you will remember and value more.