Count me as someone else who found the crying not nearly as bad as made out to be. Weddings can be emotional, and I don't know that Joy has spent as much time "away" as her sisters -- on top of everything else, the overwhelming feeling of alone, despite those people being Duggars has to be massive and just so looming.
In this video, Austin really looks at her like he cares, at least. It's sort of heartwarming to see compared to the other girls.