Yes I am aware of that later MOD. It is a smart modification. They have even a warning when ambient temperature increase beyond selected FLEX. I prefer airbus GA design of advancing thrust levers to TOGA for all occasions. Unlike B777 (possibly 737NG) where in the air you trigger the button and on ground you push the livers and rotate without FD and reset in the air. This caused Dubai accident. The button can also be inadvertently pressed. Pilots during type rating need to be taught to slam the thrust levers to stop and not nurse them to TOGA. After all you are just selecting maximum acceleration schedule. The incidents where pilots remaining in approach mode during execution of GA is due to wrong technique.