An easy way i can see this working is to add an option to the relationship field to incorporate other field groups. Once the relationship is added, it will be available within that field group and inherit the same settings as its parent group.
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ACF wouldn’t be so widely used in WordPress if it didn’t have some pretty amazing capabilities. In this article, we look at a few of the features we’ll discuss during “7 things you didn’t know you could do with ACF” at #WPEDecode later this month. https://t.co/5lnsTxp81jpic.twitter.com/Yf0ThPG1QG