---With true scramble missions at random times. No warning. Here comes the attack right now, while still in barracks or somewhere. Maybe you are outside and spot the raid and sound the warning. Run like hell to get into your plane and take off, avoiding bomb craters. Try to find a buddy to team up with in the air or lead the hit back as best you can if you are a squad leader.
And so on.
---How about "Guest missions" where you fly your favorite aircraft and skin with other squadrons?

---Operations and Mission Planning. Such as planning your own surprise counter-attack against the dirty rats who just hit your base.
Or maybe you are chosen to 'drop the gauntlet' message over the enemy airfield challenging the enemy to meet at a time and place. Then getting the hell out of there before they catch you.
Or plan for an "under the radar" extremely low-level surprise attack.