Open parties, open to everyone
A party plan that only names its parties now builds real parties anyone can join, and seats that ask for no role take any class.
Some nights you just need a few named parties, like the galley, the cannons and the carracks, and you don't care who plays what. A party plan built that way used to vanish from your event's plan list, because none of its parties had seats yet. Now a plan with no seats planned builds open parties: each gets a full party of seats, and anyone can take one. The plan editor tells you so under each party. Plans that do plan seats work exactly as before, so an empty party there is still yours to fill by hand.
Seats that ask for no role, including every seat in a party you add straight to an event, now take any class. Members picking their own party no longer see "No seat for your role" on a party that never asked for one.