It seems to me that Nintendo's problem at the moment is that they are too much pro-player. Let me explain.
Both the XBone and the PS4 are going to move to a model where games are rented to consumers, effectively killing the used game market. (Think PS4 won't follow this model? Sony already admitted that they will leave this option open to the publishers, and the publishers *WILL* make use of it).
From a publisher's point of view, this means that XBone and PS4 will earn more revenue. The Wii U is a risk to them, because the second hand market will reduce their revenue.
So even if a miracle occurs and the adoption rate of the Wii U suddenly sky rockets, and even if their titles sell well on the Wii U, the game publishers will still release games to the Wii U later than to the Sony/MS platforms. This is because they want to cash in on the initial hype of a new release, and want to maximize the revenues earned on the rental market. They essentially want any cross-console owner to buy the game on their Sony/MS console *first*, and then allow exclusive Nintendo owners to buy it once the hype dies down.
While Nintendo put the concerns of the players above those of the publishers, the publishers will treat them (and we Nintendo owners) as second class citizens. For me, this is a sad state of affairs, that the concerns of publishers are driving the way we own and play games.