When I did the OSWP exam some years back my SSH sessions kept dropping, but perhaps because I had a two or more concurrent sessions and I think there was some latency in my connection.  I think "doing" the attacks isn't what consumes time, but rather the documentation.  One of the most fun exams I've ever taken though with that thrill-of-the-hunt.

I got a copy of the updated course when it was released, but I haven't gone through it yet.  That said, I'm of the impression there's no coverage on 802.1X attacks.  I would really welcome that since it'd make the course much more applicable to enterprise networks.