Tested exporting scene as "animated OctaneRender scene" with alembic option enabled, and compared to exporting with Maya builtin Alembic.
Issue 1:
Exported ORBX loose Maya scene framerate.
framerate is always 24 FPS
Issue 2:
Exported ORBX loose Maya scene frame numbers.
frame numbers always start at 0.
Issue 3:
Maya "none" option for motion-blur is not respected in the ORBX.
This option doesn't exist in standalone, motion-blur is always enabled as soon as cam shutter >0.