Redefining the original file as WGS84 does the trick at least for accuracy for any practical purpose. The following was sent by a customer care rep at ESRI...
1] ITRF 2008 is a datum definition that takes continental drift into consideration.
2] The WGS 1984 definition used in ArcGIS Desktop is the original definition, and has not been updated to take any plate tectonic motion into account.
3] There is no geographic transformation available between the original definition for WGS 1984 and ITRF 2008. The transformations that exist between WGS 1984 and ITRF, or even between different epochs in ITRF, have 0 parameters, which means that they are being treated as being identical.