I am not advocating forcing people to keep shouting in the streets in hopes that someone will answer. You're absolutely right that it's a bad system.

But that doesn't mean that going all the way in the other direction, where the game even matches groups for us, is the best system.

What I am asking for actually doesn't even go against what they've put forward in their roadmap:
Release of a content finder system after version 2.0.
Content finder to allow input of information such as class, job, and level, to find other players across all
worlds for groups for dungeons, instanced raids, primal battles, etc.
I'm repeating myself at this point, but if you're going to keep bringing up shouting on the streets, I'm going to keep repeating that that's not what I'm after.

Let me enter in my available jobs, levels, what content I would be interested in (with an option for "any," similar to the "random" option in WoW's RDF), what party-roles I can take for it, and what languages I speak.
Then let me see a filterable list of everyone else (across all realms) who is looking for the same content. If I see some names on the list that I recognize, I want to be able to choose (or avoid) those people over total strangers.

If that ends up being too slow, add a "I would like to lead" button, which places people into a queue (very much like an RDF queue), and when it pops, it simply alerts them, "A group can be made. The following people are recommended for your group." and gives them a list of exactly enough names to fill their party with the appropriate roles, favoring people who have been waiting for group for longer (though the burden is still on them to send tells and invites). People who select to lead could still be chosen ahead of their place in the leadership queue, like anyone else.

The party leader would then have 2-3 minutes to form a group before the next leader in line gets alerted.

I do not believe that this system would be significantly slower than an LFD system.

I'm aware that I can always make my own group, but I like to meet new people. That's more than half the reason why I play MMOs, and definitely the whole reason I continued to use WoW's LFD tool despite it being such a painful experience. I tried to put groups together the old fashioned way in WoW post-LFD, but outside of abuse cases (tanks selling spots in their group since they get faster queues), it's much harder to create a party of people I don't already know when people can just as easily go to LFD and get their dungeon faster.

And it's harder to find people, the people who would normally be interested in forming parties manually have to wait longer, which then drives them to LFD. It's a vicious cycle.