Provided the approach is flown at the correct reference speed, (+5kts-0kts) down to around 30' agl, slowly closing the throttles on the 737, (bearing in mind that the Airbus throttles are simply a switch) at that point will result in a safe and not too firm arrival. The margin between Vref and the stall in the landing config is much greater than the speed loss incurred if this procedure is followed. Anyway, stalling the aircraft from 15' agl will simply mean that the landing is 'firm' but certainly not uncomfortable. Vref-7 looks like a recipe for a clusterphuck waiting to happen. Stick to the Boeing/Airbus procedures and the events you are concerned about will never arise.