The point of this method is to brew the coffee as quickly as possible. If the plunging is too easy, make the grind finer until you feel that pressing lightly would take longer than 45 seconds. If the coffee is over extracted, stir 3 times instead of 5 less. If under, stir 7 times.
We find that extraction is higher (19-22% EXT) without over extracting. Like most Aeropress cups, this is full bodied. We do not dilute. We have been able to create incredibly complex and vibrant cups with most coffees we have brewed using this method.