Scrambling six fighters instead of just three is also why I prefer a G1 airbase in Holland. Having more options eases defensive deployment and extends your counter attack range. Granted, players evolve their strategy based on some things that do not change, such as starting unit placement. But have you considered how the airbase fundamentally extends the range of the air units in that zone beyond the range of movement of invading fleets? Furthermore, Axis loves when you postpone your invasion. By changing how many units COULD join in the sea battle, it forces the invader to be strong in both zones, and postponing the invasion for too long is a route to Allied defeat.