If you like HDR images, then the answer is probably yes. If you think HDR images look fake, then maybe the answer is no.
More Dynamic Range = less contrast. If Ansel Adams were here, might be a good question for him, what is more important DR or contrast?
I will admit that I have an art background, not photography. Some basic guidelines for drawing and painting that I think also apply to photography are:
1) Use a limited number of values (Values essentially = Dynamic range).
2) The human eye, when looking at a subject in the light, sees very limited detail and values in the shadows. (just like a camera). And when looking at a subject in the dark, sees very limited detail and values in the highlights. Therefore, do not show a lot of detail in both shadows and lights. (Again, like a camera. The difference with your eye is that it can instantly switch from seeing a subject in the dark to a subject in the light, thus the appearance that the eye has a wide "Dynamic Range." I suppose going back to HDR images, if you like them and feel they look more natural as to what the eye sees, then you are not incorrect, but if you don't like them and feel they look unnatural, that is also correct. It depends on how you interpret what the eye sees. What it sees in what instant, or what it sees as it almost instantly adjusts.
I understand that with more and more dynamic range, you can edit in post to add contrast and reduce DR where you want and how much you want. If you don't mind major post processing, then I suppose more DR is always a positive. If you want to minimize post processing and want more contrast - and more saturated and "punchy" color - as many people do comment on as something that they used to have with older cameras - then maybe more and more DR might become a negative.
In terms of more pixels, I think we are all aware that more and more pixels means smaller pixels and that diffraction then becomes more and more of an issue. And while sensors have become very efficient, and pixel size has become much less of a factor, real world results from actual photographers continually support the idea that cameras with less MPs still have cleaner images at higher ISOs than higher MP cameras.
