Because they have been shitting the bed for like two decades... Project Rainfall shouldn't have been a thing and NA should have been able to get Disaster: Day of Crisis plus all the other crap they do. Honestly, they should all be fired, get some decent people that aren't trying to run Nintendo into the ground. If they are worried about sales for the game, release it as a digital only. It's not like there is a lot of 'mature' content on the Wii U, why limit the possiblity of expanding a market... 

You take a hit on profit to keep your fans happy and to diversify your output.
I feel sorry for you guys in Na because I genuinely think that this game is going to be a blast, at least multiplayer wise.
If I was a Nintendo onky gamer id be pretty done with their shit by this point.

They simply can't appreciate the hard work that Itagaki has put into this game.

https://www.youtube.com/watch?v=Vmp8ATOTMTM#t=11m05s

Yup, the fact that Itagaki even had to say that proves that something went wrong in North America. If NoA won't release it, then I wonder how he'll be able to bring the game stateside?