I’ve been using ACF for several years now and have over 100 sites I’ve used it on.
One thing that becomes apparent is on larger sites there tends to be a lot of field groups – it can become quite tricky to find what fields affect what pages/posts.
Is there a way – perhaps on the field group overview page to show what rules affect what post types? Also is there a neat way that when you click into a field group, it shows the posts/pages that are using the groups?
One problem I had recently was that on a site with several CPT’s, I had a rule that was affecting a specific template. I had to make a change to it but I didn’t know what posts used what template.