OK, talking about the D500, and some user experiences. I went on holiday the other week and found the D500 metering to be more inconsistent than my D300S. I've been to the same location a few times with the D300S, taking similar pictures, so I have a good idea of how that camera performed in similar circumstances.
There were a few mid brightness scenes that really underexposed when it it shouldn't have. I found myself bracketing exposure more, either measured +1, +2, measured -1, -2 or measured -1, +1 dependent on the scene. Used in conjunction with the continuous shooting mode it was very quick to do, but I would rather it was a consistent as my D300S was.
I think a lot of newer camera take into account more what is under the focus point used even when using the multi meter. Note sure that was the problem in some instances.