I think it would be a lot more practical to have 2-finger tap/3-finger tap for Undo/Redo, instead of swiping with 3 fingers left or right. Sometimes undo doesn't work with Swiping with the first attempt and moves the canvas instead...which is always annoying.
And you can in this case move the Zoom All gesture to be four-finger tap, replacing two-finger tap.

Thanks!