How you rate a camera as all round depends on how you weight the individual features in your scores - a bit like DPR giving an overall score for a camera or DxOmark for a lens -....
Exactly. A camera rating site could, perhaps come up with a list of attributes that a viewer can check off or put a priority on, then show the cameras that score highest in those categories. That would be unlikely, because ratings for things like autofocus are really tough to pin down, many factors affect it, light intensity, light color, contrast, even air temperature, so any score is going to be biased toward testing conditions and not towards your specific use.
If you don't check video or 4K video, then the video rating would not be factored into your results. If you want 40+ mp, than that would be factored in, it might be another way of helping a buyer find what works best for their usage. I get the feeling that many people buy capabilities they don't use, and such a person is sitting right here!
I do use corded tethering, and occasionally, wireless tethering, so performance in those areas might be a higher priority for me than for most. Generally, Canon cameras score very high in tethering, so that's one of my likes. I also like the touch screen, because with my loss of feeling in my fingers, I find it much faster and easier most of the time. I have a big problem feeling the shutter button, and have glued a raised button on my cameras to help me feel it. I'm not aware of any camera that would be outstanding for me as far as feeling the shutter button. Ergonomics would be another impossible to pin down rating.
I think that different cultures have different expectations as well, perhaps the terminology on the screen might be better or worse, depending on translation?