The problem will be that if you do anything right now, it will require a breaking change to the archetype later, other than using the ELEMNT.null feature. or adding a temporary DV_CODED_TEXT alternative.
I suggest @sebastian.garde and I take it to the SEC and see if we can get a quick Spec update agreed. It would also need a change in tooling and ultimately in the CDR validation.
Is there a really pressing need?