The current find/setup party system is great

[Abriael]

Your problem would be fixed if they allowed party members to join parties while the party is engaged, it's not really a matter of flags vs. the current system, but rather about our current system having to deal with a lot of dumb mechanics.

That's not really much of a problem to be honest. If i try to join a party and I can't, I just send a tell to the leader and ask him if they can stop fighting for a second. There are reasons why you can't join or leave parties while engaged (and it'0s like that in many MMOs), as the possibility opens the way for exploits.