Personally, I think the Wii U is going to recover enough to see decent lifetime sales. However, a lot of your arguments sound very 'head in the sand'.
Nintendo launched the Wii U with very little software support, probably with the idea that the hardware features alone would entice customers. That has not been the case. Nintendo had a chance to build up a solid installed base, and thus the ability to influence third-party developers and publishers, but they've pretty much failed at that. The Wii U's realistic advantage in that area, by the end of the year, will be negligible. It's already being skipped over for that reason.
You're right about the Wii U being in a different boat than the Vita, though that's not actually something to brag about. The fact is, Nintendo had the advantage here and pretty much whiffed.
