As the title says.
Alternatively, let us set up our GAC defenses before the event even begins, and then just have that as a default template for every GAC unless we manually set squads up.
It's very frustrating to miss the window of setting defenses for round 1 and being unable to attack because the game auto assigned all of your best characters on defense into random, illogical teams.
Btw I typically set defenses round 1 and then let it auto assign for the next rounds. Sometimes I get busy and forget to set defenses and it's extremely annoying to just auto-lose because of it. I get that you should be rewarded for being diligent and investing time, but this game sucks up enough time as it is.