I always put thrust idle just before or during beginning of the flare at latest to avoid the engines spooling up unnecessarily.
Flying A/THR off is one of my favorite things while flying in good weather and it amazed me how the speed is so stable on A320.
pineteam, what you are doing is the correct way to flare and land. Ironically in airbus Speed is stable in manual thrust because Airbus FBW is flight path stable and not speed stable. Aircraft maintains the flight with thrust change. In speed stable aircraft thrust change will cause pitch change which needs retrim.