Having down the walk to the bottom of Ozy and back, I think if you are careful in your route finding at the base of Ozy you should find the walk out straightforward in terms of navigation once you find the track on the other side of the creeks for the walk out.
Rod could confirm this, but from the bivvy spot at the base of Ozzy right by the first creek crossing (on the Ozzy side) I would estimate that the track up the other side is somewhere between 50 and 100 meters downstream - as others have said crossing three creek courses. There are various pads through there and if you are used to bush bashing and have a good sense of direction it should pose no significant problems and in my opinion is the only significant navigation difficulty you should encounter. However some have found the creek dangerously high in the past - so be warned.
The walk out has a number of short sections of hand line in sketchy scrambling, but these are mostly sketchy when you have a massive haul bag on your back. On my walk down I wasn't carrying anything and I found them straight forward.