I think we might be getting a bit too hung up on the more minor quantitative aspects.
To me the system is at the point where it wouldn't really matter if it sold 55K or 85K this month, but that the overall message is that while the system responds to software, overall it's still not going anywhere.
Given that it's not really reasonable to expect Nintendo to keep doing the same thing they are and actually see a notable uptick using the same model next generation, we're at the point where they have to completely reinvent their strategy if they want to stay in the home console hardware business.
They're quite unlikely to be able to compete with Sony and Microsoft on the high end given that tends to be expensive and they don't have the same demographics. The slightly cheaper system with a new control scheme avenue doesn't seem to be working so hot anymore either now that everyone carries a great casual gaming device in their pocket all day and many have one on the coffee table to boot.
Looking at what's actually selling, it appears to be a mix of games that sell to a wide swath of Nintendo's most faithful audience, who generally seem willing to play on basically anything Nintendo releases, and some kids oriented games like LEGO, Skylanders, and Disney Infinity, who are going to be very price sensitive gamers (well, at least their parents probably will).
Given that anyone who doesn't buy almost every Nintendo game is unlikely to be happy just having a Nintendo home console, I think positioning their next attempt (assuming they're making one, which I believe they said they were) as a notably cheap system you buy in addition to whatever you are going to primarily play games on might be their best option. They could go after way more impulse buyers that way ("I want Smash, and I'll pay $150 to play it!") and cheap things sell very well to both kids and holiday shoppers.
That's been my stance on it for a while. Drop all the gimmicks and make a super cheap companion console that's easy to develop for. People will buy a PS4/Xbone and a Nintendo whatever to go along with it.