The one currently in game sucks. Actually most party chat, party invites, friends list features are completely bugged at the moment. So ya.
Having a “lfg” party finder system which has become the staple of games now is kinda mandatory. You have all sorts of people in different channels/servers needing to do specific boss fights or grinding in certain maps. I would highly recommend taking the time to enhance the party finder especially where dungeons are concerned.
Its bad enough that everyone is just afk outside of the dungeon and that half the time the dungeons don’t even work or let you in.
Especially because the game is all about party play in just about everything.

We need this so bad. It is so difficult to party up with random players.