@Imperious:
Yes your just paying for the privilege of getting more movement, but the base can scramble fighters against the sea zone where the island is located if the enemy decided to move in this area. It also gets an AA roll against attacking planes that may try to attack the small island.
Bases’ built-in AA protection is only against SBRs on the bases themselves. It does not apply to normal attacks against the territory. You still need an AA gun for that.
Is the rolling system for AA guns changed at all?