Canikon are both lagging behind in video, the difference is Canon is improving usability with a touch screen and OSPDAF, so at least they are doing something,
The point is manufacturers are updating their AF, nobody wants a new camera without any updates. Canon 6d2 has 45 cross type AF points, Sony has gotten to the stage where its as good if not better than the competition. Are you suggesting Nikon shouldn't bother?
Yes, reliability is a problem for Nikon, pretty much every modern Nikon dslr has had a recall for main components like AF and shutter, then theres battery recalls.
Have you not noticed that everyone is increasing megapixels? Its a good thing, computers are more powerful, memory is cheaper, sensors can be higher MP than last gen without any IQ penalties.
It would be silly to suggest Nikon not make these improvements to a 3 1/2 yr old camera at refresh, Sony will soon become No.2 because Canikon haven't been innovating enough.