I am figuring out similar issues. In practise what I would like to do is to improve orientation in Drone2Map, SiteScan or ArcGIS Reality and then bring those improved values to Oriented Imagery Catalog. Now OIC seems to trust more or less always parameters it founds on EXIF and my wish is to improve those via proper orientation.
I can do it today, but it is bit clumsy. I need first get X,Y,Z,Omega,Phi and Kappa out from tables of that orientation tool. Then convert those somewhere else in Pitch, Yaw and Roll and update those to OIC camera location table.
What I am missing a tool to bring in exterior orientations to OIC from external YPR or OPK tables. Actually the OPR to YPR conversion as a part of this import would be nice. Now I need to do tablework somewhere else and then just fix current tables with normal table tools.
So update orientation table is the function I am wishing here.