Alright, yeah, unfortunately, I'm going to have to stick with ACF until you guys can fix this simple issue. What I need is for the group functionality to work just like the repeater field in ACF. And, in ACF, you can easily remove every row as well as have ZERO rows. But, with Metabox, it seems as if it is impossible to delete a row if you only have one. That is a really WEIRD limitation to build into the interface.
Please fix this. Seems so simple.
To be honest, the interface for this should be similar to the field builder when adding sub-fields in a group. It works beautifully. Nice icons for expansion, and a clear trash button to delete a sub-field. Also, white background to make it all look good.
Do that for group fields, too. It is sorely needed.