First issue I have w/the updated camera UI is that the zoom icons are too small and too crowded together. See screen caps below w/One UI 4.x on the left and One UI 3.x below:
The three icons in One UI 4.x are both smaller and crammed closer together, making it is easy to accidentally choose the wrong one.
Please increase the size of the icons and separate them more so that those of us w/larger fingers can easily/accurately choose our desired zoom level. Thanks!