Hey Michael, Dave-
Some aspects of zooming in LayOut are improved, and some are not.
LayOut now has a preference to control zoom speed - this allows people to customize how quickly LayOut attempts to zoom in & zoom out. People with smaller, more efficient files will find this useful.
However, for larger files, or while editing a group, LayOut can run into performance issues which will result in lagging during zoom. This is a hard limitation that depends somewhat on the specs of the computer, the size of the file, and what’s on the screen during the zoom. In this case, the zoom speed preference will have no effect because the computer is already working as hard as it can.
The LayOut team is definitely aware of this issue and has been working on ways to improve it. For the time being, know that the following things will slow down performance the most: editing inside a group, having vector-rendered viewports on a page, and to a certain extent having large inserted images.
Thanks,
Marc