The ability to apply question logic to nested repeating item questions, like we are able to do with repeating item questions.
Also, maybe a separate issue but related: The ability to condition a nested repeating item on an answer to a question in the main repeating item. For example, a repeating item that asks for a list of children, and a nested item that asks for that child’s children only if the child is deceased.
Agreed, it would definitely be useful to apply condition on if a nested Repeating Item Question appears or not, based on prior answers in the main item!