This isn’t really anything new; this has always been the case with Apple.

There is nothing that you or Apple can do about the viewing angle, but as for the color temperature, there’s a lot that can be done; but Apple won’t let you.

If you ever used an Android; then for the most part you can adjust the color temperature to your preferences. Unfortunately you can’t do that with iOS.

I personally don’t really notice the difference, unless I compare the screens side to side. Usually I just get used to the screens color temperature; but some people just can’t.

iPhone Display Color Temperature Comparison

Don’t be silly. The difference in performance between the pro and no pro versions is negligible. They both will receive the same level of support.