Co-op play with a friend is really fun - almost like playing old school D&D.
But the whole process of loading that game / restoring that game to be played later is problematic.
When you create the lobby, it would be great if you could pick the game to load AND allow the co-op players to select which characters they will control.
The current experience, it basically forces you to start a game from scratch and make characters and the once you load the old game, you have no control over who gets to control which character. Worse, you might not be able to control the character that you created when you first made the game in an earlier session.