I've never had a problem with it. I never did it and then a group wanted to do it but everyone else was scurd. So I was like, sure. Just like anything else, you just need a bit of experience on the drakes and you're gtg.
It might be just me, but it feels like Oculus is like Culling, in that the mount is a 100% drop for someone in the party. I didn't pay attention the first 8-9 times, but after that it has dropped every time for someone for the past 20 runs.