Undo actions are too bunched together
Whenever I Undo (Cmd+Z), Slides reverts the last 3-5 changes I made when I expected it to revert my one and last change. I think it would make much more sense, coming from apps like Photoshop, Illustrator, Sketch, or pretty much any editor dealing with graphical elements, to Undo one action at a time, even if it's moving an object a few pixels, or changing text content in a text area.
This has become frustrating because when Slides has reverted the last few changes, I have to go back and manually redo the changes I wanted to keep, or I can press Redo (Cmd+Shift+Z) and manually remove the changes I wanted to Undo in the first place.
Because of this, the Undo functionality is pretty useless unfortunately.