So, you'd think that STRUCT EYEPOINT DYNAMIC OFFSET might have something to do with the camera position as set by SimConnect_CameraSetRelative6DOF(). But you'd be wrong. FSX doesn't actually have any way to query for the current camera position from SimConnect. You can be notified when the camera position updates, but the associated event data doesn't include position or pbh (position/bank/heading) data.
Struct Eyepoint Dynamic Offset tells you how much the eyepoint has bounced up and down relative to its initial position in the VC.
Eyepoint Position tells you what was specified in the .cfg file; it never changes.