It’s been a while since this was asked, but we encountered another use case that has more substantial impact. We’d like to use Numeric Data Types to control date fields, but each Resource Template will only accept a single data type from the module. So we can choose Interval OR Timestamp, but not both. In many cases with older collections, we have some items with a specific date and some with a rough interval.
It would be very helpful to: either assign two possible data types to one Date field OR to allow two Date fields with different data types.
I guess one option would be to create multiple Resource Templates with duplicate field settings except for Date, but that becomes complicated for bulk uploading.