planes need a 1 min spawn delay on start of maps to stop them mass farming the enemy spawns when everyone is grouped together.
if you want immediate plane spawns the AA gun needs to be a <10 second craft so players can defend themselves on the ground.
Spawn delay would lead to issues due to how spawn priority is set up right now:
If 2 players want to spawn into a vehicle, of which only 1 can be alive at the same time, the one with the higher alphabetical priority (A>B>C) will spawn, while the other will get locked out. If you have to wait a full minute, while continuously risking getting locked out because of this, will not be enjoyable.
Instead, if the spawns are moved back 2-3 kilometers, the plane would need a lot more time to reach the combat area, giving more time to the ground troops to spread out.