Where as in many aikido stand-up locks the body is not based, therefore most can be reversed with relative ease. So as a cogent strategy I wouldn't see an aikido connection in it at all.
I was thinking more of the seated pins - while not having the same bodyweight aplied as omo - they do offer more stability and focus on the shoulder.
Kevin - totally agree about the knee ride - I think it's one of the most under utilised positions in BJJ given its usefulness for non comp applications. Remember a few years ago we had a gasshuku - Moriteru Ueshiba and came over with a few others. Arai Sensei became my firm favourite the minute I saw him drop to a back ride after a particular technique...