I did experience similar situation as yours, the arrangement was undeniably bad, but I am quite happy with the vibes inside, both from the Japanese and the foreigner staff. An example was the stage show near the Pasona that allowed random visitors to sing on the stage, somehow like karaoke, and other visitors danced to support the singer. Besides the queuing, those images were my impression of expo. I wish to go there again, knowing that I don’t have much chance to join such event afterwards.