Yeah, thats pretty much the problem I have. I'm very comfortable with a front squat, not as much with the OHS. My shoulders act up a bit in the OHS, mainly because I don't think I'm shrugging them hard enough. I got fairly low on my 80% cleans yesterday after doing warm ups with hang squat cleans. THe snatch was better, but I'm still only getting down to just above parallel.
I was thikning about OHS squatting each rep on the snatch to work on the bottom position.