I agree with a lot of your points. There are definitely things Nintendo did right with the Wii U. Even if the console turned out to be less than successful, these improvements should not be forgotten.
Third Party Relationships:
It's obvious Nintendo DID spend some time with the bigger publishers this time around. They need to expand that and talk to other studios and publishers, as well, but it is a start.
Small Studio Games:
Nintendo did an excellent job here. I don't know what happened but someone needs a promotion. Nintendo had some pretty unfriendly policies with the Wii but most of those were identified and fixed. They actually passed Microsoft here, at least for the time being.