Sorry for the late reply.
(speaking from Civil Engineering standpoint):
The problem with Project basepoint and internal origin is that the project basepoint is meant to be used in the same way as a “UCS” in AutoCAD, while the Internal Origin is actually used to calculate all coordinate positions in the model from. this means everything, including the geometry extents is defined by the internal origin. not the project basepoint. The project basepoint also allows you to rotate model geometry with regards to “project north”, so by default this can give problems with recalculating/repositioning geometry. For me, when transferring geometry from Civil3D to Revit, I use the relative position to the interal origin because of the flexible meaning of the project basepoint itself.
With regards to survey: this is what the survey point is actually meant for, but no-one is using it in that way.