Very Unintuitive, Weird, Annoying, Inconvenient Zoom
The center point of the screen as both start and end of the zoom -the point of changing direction from zoom-in to zoom-out, is a really, really bad idea as you can see bellow, especially when sculpting, as you have to do that all the time, using the pen along with a button and key, so you get this kind of zoom behavior:
Solution: make the zoom-in - zoom-out ONE-direction, eg upwards = zoom-out, downwards = zoom-in.