I would love to see non-schema "Note" fields in Field Maps. Basically a dummy field that allows custom expressions that is not part of the attributes, similar to Survey123.
I think this would really open up the smart form aspect of Field Maps and allow things like warnings or custom group headers based on other field values.
An example would be an inspection form that is assigned to a operator. If that operator is not certified, I would like a "note" to popup as a warning. I currently have to create another field to serve as a warning.