No objections here. It's our flying technique. But only when above 500'.
As a recap: engine out on final -> stabilize (rudder!) -> flaps 15 -> speed bug Vref +20 -> thrust to initially 80%N1 (rudder) -> All stabilized and above 500' and then GA? -> flaps 1 and follow EO GA.
All other case GA is made with flaps 15.
Don't try to retract flaps in the GA: u will stall almost instantly. (did it in the SIM once due to obstacle obstruction ahead. Will never try that again)