I realize there are a lot out there that disagree with me (saying that people who use the mission editor are gangbangers who ruin the game by using fluff tactics), but I think the mission editor is a great thing that rallies countries to a common cause, resulting in more success, better scores, and more fun had by all.
I propose missions flown from the editor should have a perk value.
What I envision is very simple. Every mission with 10 pilots or more warrants extra perk points. The host keeps track of the running total of points earned by planes in that mission. Should a pilot in this mission get shot down/ditch/captured, he earns and extra number of perkies equal to 5% of the total perks earned thus far. If a pilot lands, he earns 10% of the total perks earned thus far.
I realize this is a very selfishly centered idea because I live and die by the mission editor, but I honestly think that this would greatly increase the use of missions in the MA.