A smaller list of approved IDs that increases the number of people hassled by the TSA for ID-related reasons. Definitely a mess that will lead to more confusion just like you said.

This whole ID checking by the TSA should just be scrapped since ID checking by the TSA is not security and does nothing to prevent weapons and explosives that could be done by the TSA doing its job properly in screening persons and their belongings for prohibited items -- a task which is easier than behavioral detection yet one at which they routinely still fail -- instead of wasting resources hassling passengers with questions because of ID-related reasons.