That sounds like a reasonable position. Google would have an advantage in getting timely AOSP and security updates, but getting that stuff done should be a high priority for all manufacturers anyway. As for the rest of the list, there are things I don’t know about - but at a glance it looks fair enough. So I guess there could and probably should be other phones trying to meet those conditions.

For example, they’ll regularly suggest using sandboxed Google Play over F-Droid or Aurora Store

Because many of my used apps are only available in Google Play.

GrapheneOS gives you options that you don’t have to use. I don’t agree with you.