The maneuverability thing is mostly a myth. Sure it's theoretically possible to build a drone that can turn at >9G. But it won't have sufficient thrust to sustain that rate of turn without losing a lot of energy. And now the airframe has to be stronger to handle the stress, which means heavier, and that compromises mission effectiveness in other ways. And for all that it still wouldn't be able to out maneuver a missile in most realistic conditions.

A better option would probably be to design drones that are less maneuverable. Sure more will be shot down. But that will lower the price so just manufacture more.