The dSLR market is facing a lot of pressure, and I suppose dSLR manufacturers are still a little lost.
While it is quite clear now, or indeed, even a couple of years ago, of what the trend is, development and production roadmaps are determined several years in advance.
I suppose this is more of a measure of how nimble management is in adjusting development efforts to new trends. Some fare better than others. You still cannot deny that Nikon cameras are still good at what they do, and as a corporation, still quite profitable.
Maybe there is little pressure, other than all this online "feedback", to do more.