The boy is 13 now. He's my son. Played the AF Reboot since he was 8. Even I was shocked.
Anyway, I fix the difficulty issue. It should be playable now. The trick was just tweaking the difficulty factors like player damage, recharge rate, number of attackers allowed, and other stuff like that. There was little need to modify the missions and the ships. I will upload the update as soon as I am able.
FOR NOW, STRICTLY PLAY IN "VERY EASY" DIFFICULTY
I tried reducing the enemy hit points like someone suggested but I results that I didn't like. My Friendly squadron destroyed the all the hostiles before an important event was triggered like an enemy destroyer comes within range. Since I don't want to respawn lost hostiles to keep the intense action going, I made the enemy fighters equal to the friendly fighters. The specs of the Serapis Mark II is almost the same as the Avalanche with 1000 hit points. But that is not always the case. Because in some missions where I need to conserve enemy fighters, I increased their hit points even more. In other instances I change their armor types in-game.
It just that players must not be detracted with "filler" hostiles, hostiles that there for setting the environment.