Ignoring for a minute the fact that you’ve added your own layout of boxes for WP, what you describe is completely possible using ACF by itself.
You would start by creating your fields that need to be duplicated to all the boxes in a single field group. You would set this group to inactive, meaning it will not be displayed anywhere automatically.
Then you could create a new field group for each of your “box” layouts. Each of these groups would have have a “Group Field” representing each box set to block display. There could be a different number with different layouts in every field group. The location rules for each of these groups could be assigned to different page templates. Each of the groups for all of these field groups would have a single sub field that is a Clone of the field group containing all of the fields.
