It seems to me there is a slight advantage to being able to wait until near the end of the closing time for the match to enter the battle. If you can wait until after your opponent has exhausted their offensive teams, knowing what score you need to beat can help you better plan your attack strategy. So...here's the problem: I live in Taiwan. The timing for GAC matches always has them ending at 4AM my time. Unless I want to wake up at 3AM to start my attack, I'm almost always the first one to attack (which I generally do at about 11PM to midnight, before I go to bed). So assuming my opponent is from the US or Europe, they always have the luxury of knowing my offensive result before attacking, and being able to start their attack at a reasonable time.
Out of fairness to other players around the globe, would it be possible to consider rotating the start times for GAC seasons so that people in other time zones have a chance to use this slight advantage at reasonable times occasionally?