This weekend I started looking at the available plugins for reusable field groups. Testing and research turned into an entire weekend and at the end I had created my own version of a reusable field group field.
It works a bit differently than the others, it works by rebuilding field groups that include a reusable field group field ans local field groups which override the original field groups. This only works in ACF5, ACF4 does not support acf_local().
I have not completely tested it and would be interested in feedback or bug reports. I’ll also answer question. There’s not documentation yet, mostly because I think that the instructions when creating the field are pretty self explanatory.
https://github.com/Hube2/acf-reusable-field-group-field
