At this rate the Wii U is going to end up as a dedicated Mario and Zelda machine. We've already seen retailers slash the price of the Wii U for the second time in the six months since launch and Nintendo really needs to be doing more to attract third-party games if it hopes to compete, especially those with a history of being multi-platform like Madden. Things will only get more difficult in the future when games are developed primarily for the PS4 and X720, as the Wii U simply doesn't have the power to compete with them. Nintendo still doesn't have an exclusive core FPS to rival Halo or Killzone, nor a racing game to rival Forza or Gran Turismo.
Nintendo produces a lot of quality games but the audience is simply too limited with the company's current approach. I think it would be better for gamers if Nintendo followed the example of Sega and moved entirely into software development, especially considering that Nintendo has a much stronger collection of IP.
You don't waste any time continuing to harp on how you beleive nintendo is somehow in as bad of a spot as sega was(hint: they weren't before, and they're still not) and how you so desperately dream of them going 3rd party, do you?
Hardly BS, why waste hundreds of thousands of dollars porting the game to Wii U with such a small install base. It hasn't even broke 3m sales yet, even the Vita has sold nearly 2m more.
A platform that's been out much longer has sold more? NO WAY! Next you'll tell me something like "water is wet".
As for why they should, it's simple. Because 3rd parties have a responsibility too. And if they don't bother to play their part they are no less responsible for the system doing badly than nintendo is.