Not sure how to structure an FSO event for WWI.
Basically all you have is sweep and engagement missions. No bomber escort, no defense of ground forces, bases, etc. No way to simulate Fighters trying to prevent other fighters from scouting, spotting for ground forces, etc.
I would like to try it out but simply don't have an idea yet how to construct any objectives for it that could carry on over multiple frames outside of you force A go to sector B, force B go to sector B and fight (sweep).
Will have to give it thought.