In edit mode, increasing the window size should also increase the zoom
Currently, when you resize the window, the zoom factor doesn't scale with it. In case of increasing the window size, this results in a large amount of unused screen real estate (until you manually zoom in to correct it again). It would be nice if PPT automatically scaled the content to make it fit the window while resizing.
I'd rather not have this feature, unless it was an opt-in toggle.
If you do want this functionality now, you can have it by clicking the "Fit slide to current window" icon to the right of the zoom bar in the lower right.