As a Nintendo fan I'll buy these systems for even a few of the first party games alone.
there's a new Zelda(wii) coming out November. there's a new Mario(3ds) coming out November. Kirby will be seeing a new game soon. Pokemon is due for an announcement within the next year or so... Look for it, kids are still crazy for Pokemon. I think in japan monster hunter is big, that's coming out soon. Dragon quest games also tends to sell lots of units.
As for marketing, People actually thought the Wii-u controller was either the entire system or just another add on to the Wii when it was presented at E3. So ya, Nintendo should improve its marketing.
It doesn't matter. Quit looking for the leadership. Nintendo remains profitable and that is all that matters. Buy it now while the company is looking for direction, sell when they are king. You don't buy high if you want to do well, you just don't.