A note of different opinion-
Full span aileron /flap/flapperon does assist in making slower horizontal speed landings
BUT a more epowerful engine /motor is an asset as it takes more thrust to fly slowly than to fly at cruise .
Why?
vectored thrust is required to replace the wing lift lost at slow speed
The extremely high drag to lift configuration ,literally has to be drug along by thrust
You may find this is some book - I dunno
However - if you actually try it you will see how it all goes together