The problem is, while I'm sure those titles you listed will help in some way, equivalent titles were available on the GCN.
I think while Nintendo's first party is certainly very strong, it's strength is often overstated. It cannot carry a home console system alone as some (not directed at you) seem to think.
And that they seemingly lack third party support is a major issue, because first parties cannot carry a system alone.
I guess it depends what they're hoping for. The Wii was a special random crazy thing for them, it caught in the public interest, and the casual game thing, it sold incredibly well for them, but the GC didn't bomb. It came third of four, sure, but it made Nintendo money. I don't think the users were hurt by it's softer sales either. If the Wii U only sells forty million units over the next eight years, it's not some unthinkable tragedy at all, right?
And I'm not trying to spin for Nintendo, I don't care much either way, they're going to give me a Zelda, and Bayonetta 2, and if I never touch it outside of those, I'll be fine with that, but I don't think the average Wii U owner is going to be negatively impacted by the system not matching the Wii in sales, and I don't think Nintendo will be either.