Hi Greg,
I am keen to make an enhancement request for this, Would anyone be able to post an example XML file here for me to take a look at.
For now, you ideally need some form of geometry or Loci, then you could use the Modify - replace with symbol command, however you wouldn't get splay angle/angle relative to proceeding.
Would be good to get an idea of the typical data that would be exported and I can start the request.
All the best
Tom W