this post looks helpful, from the oculus forums.
Could anyone provide a more comprehensive guide on how to achieve the desired initial camera orientation when toggling possession between multiple pawns (blueprint if possible)?
I tried entering a value in “yaw” within the “reset orientation and position” node. That enabled me to start with the camera (VR) facing towards -x, not much, but at least it’s not only +x anymore… 
It could probably be done by “forcing” the player controller to it’s intended position when needed (haven’t tried that yet), but I’d be gret to be able to possess pawns but “inherit” their intended facing.