One finding (expected) is that moving to the GGDM data model will affect how certain directory paths are calculated since this is based on both the FACC-like 5 letter entity code and the actual name of the entity type.
Based on the initial mapping from GGDM to CDB, a majority of the names and codes will stay the same, but not necessarily both for each feature type. For example, BUILDING is AL015 in CDB 1.1 but AL013 in GGDM.
The existing CDB standard feature dictionary should properly handle this case already - but CDB implementations may or may not be prepared to deal with such a change.
Filing here just as a reminder to include in the ER.