Add the ability to store a default party placement setting. If invited to a
party, you automatically try for the exact position, and should that fail, you
attempt to join in any part of that row. If the leader invites you to a
position, the invite overrides your default. If you try to default to a full
second or third row, you then attempt the other back row in a similar fashion.
With little work, this could be expanded into a method for parties to
automatically reform when placements are disrupted.

I support this idea!