Thanks for all the info Don.
The above photo was taken at an airshow where the weather was generally very overcast. I had been shooting an F-35 demonstration right before this. Here are some of the reasons for my settings. My Sigma 150-600 is a tad heavy when shooting all day. I tend to get less stable as the day progresses. I get a higher percentage of keepers by keeping the shutter speed higher. I have seen a bit of blur at lower speeds with this camera(from my instability). The D500 will amplify all your bad habits and poor technique making them obvious.
I have found that my personal preference is to bump the ev slightly as I prefer a brighter picture with better detail. The D500 (in my opinion) tends to produce better results when slightly overexposed.

I am open to any and all constructive observations and suggestions