In order to do that you would also have to calculate takeoff thrust… A lot more goes into the TO/GA than you think… :P It doesn’t just move the levers to a static N1 precentage…
How is pushing a button different for you than sliding the trust up? I don’t get it. Are you looking to make it easier or just different? I can see people pushing the button and forgetting about it and then they go over 250 and get a violation (and complain).
Maybe add that it is primarily used for go around, and sets the throttle and pitch (pitch on flight director) necessary to maintain 1000 fpm at that speed, making it easy as pilots have to retract flaps gear and turn, so it reduces workload
I agree, this button should be added, so I can program it in case of going around. It would have predefined settings like HDG, ALT, N1 speed, it would be really helpful, in case you have to go around in the last moment. This button would be very useful for people flying with joystick