I found a D4 official Discord channel, not sure if this is from blizzard itself which will pin players of events headup in the game . Players could use the discord to form party, tradings, pvp etc…
If this is truly created by Blizzard for LFG .
I will be amused by their intention. Probably they thought that in the future MMORPGs, players will not longer use in-game LFG and would favor third-party software. well to be honest, its fine with me but pls make it simpler to join a party instead of adding a friend first then invite to party. this is plain silly and time resources wasted.