Been playing with the mini 4 pro and the zoom really degrades the quality. For some reason using the zoom looks worse on the mini 4 pro compared to the mini 2 and if you use x3 it gets even worse. I know it's only digital zoom.
I think zooming can be useful to help you frame a shot. But agree, after using it to frame and making sure I like the angle, I would zoom back out and crop it in post. More flexibility, and potentially better upscaling tools.