Hello 
I also would like to ask to keep it behind a site setting. I like it but the way it works not really. I mean with adding the [grid][/grid] tags, people can easily break the images grid view. I understand why this is important, but we just don’t have enough time to fix these broken grid galleries after non-tech users all the time. We would like to keep it simple as possible.
Plus this only works if the images are uploaded at the same time. If they are uploaded one after the other, it will not detect this and will not automatically insert the grid view.
We have been using the Masonry Image Gallery theme component for a long time which is automatically makes it without using tags.
I would like much more the core version but unfortunately that is less user friendly yet. 