Out of curiosity, what about the case improved the button for you?
(Don't have a 16-series phone myself yet, but was underwhelmed by the UX of the Camera Control button when I visited my local Apple Store to check them out. So I've been curious how other people have acclimated to it. Or not, as the case may be.)
What about the case improved the button for me?
I have tried several non-Apple cases and none of them come close to the feel of the Apple Silicone case.
First, it is covered with the same/similar texture with that of the rest of the case.
Cases that have a hole opening are often sharp or uncomfortable.
I very rarely hit the camera button by accident when it is in the Apple Silicone case and holding the phone in the Apple Silicone case is an extreme improvement vs. other cases.
All in all, I would rather not have the button but the fact that Apple does have a Silicone case that covers it up with a similar density of the camera button cover, it is almost non-existent when using the phone.