Well I disagree that Nintendo can't support two consoles effectively. They can if they bloody space the games out.
As I have said before, from 2011 through to the end of this year, Nintendo have published 159 titles across four formats. Retail wise, it has been an average of 1 retail title a month for the Wii U and 1 retail title a month for the 3DS, too.
If they spaced them out a bit, then there wouldn't be as many issues in regards to droughts.