As an update to the original question, I am producing accurate DSM files that are using GCPs in meters. However these rasters are not usable to me in a global scene without being converted to feet. Short of having higher level licensing privileges, I have to create contours in 3D analyst(create TIN, convert TIN to Raster) and do a conversion to feet with this process. It's just a little cumbersome.
I would still love it to have the feature built in to D2M as a way to convert to your working coordinate system within the processing functionality.
I'm all ears as to a better way forward.