Hi @ravenna
Great to hear that you enjoy ACF.. I’ve been using it myself in pretty much every project since a few years back.
I have not heard of anyone attempting to create custom theming for ACF. However I do know that in the next bigger update there will be UI improvements such as better collapsible options etc. for repeaters and flexible fields. There will also be the ability to set a specific field in a repeater/flexible as a “label” for the collapsed row.
These are features currently being beta tested by the github community so it should not be long before it arrives 🙂
