I don't understand the point you are making. Over 27 seconds it went from a 3 degree Vref approach to a stall. There is no way you can get anything from an 'average' RoD. Show a plot at 27x1 second intervals and we can talk. I don't think the RoD was particularly 'steep' there anyway until the very end. Just in the wrong place. Also they had full power at a high pitch angle to cushion.