I know everyone is afraid of all these potential issues & linkshells becoming obsolete. The community becoming jackasses etc.
(tl;dr, see bottom of post)
The truth however is you still WANT a linkshell. Just cause you can queue up, doesn't mean you have to be solo (ideally).
Maybe you get in a party with 6/8 of your linkshell (because for some reason those 2 people can't make it today) & queue together.
Linkshell/Free-Companies will have there own benefits anyway. Also, Having a core LS to do the hard-mode content will always appeal over a random search for endgame content.
If it's not an event day & you're bored, you can still do content as well.
(this shouldn't even phase linkshells or hardcore players at all)
Now anyone can login & queue up for leveling, dungeons, raids, PvP (etc) without the game becoming a stagnant town-snooze amidst mindless crafters & troll shouting (hello Port Jeuno).
Overall, this will be great for casuals & easy to enjoy the game. Just like how the casuals whined at us for PLing & we told them they don't have to use it, well...
Content finder appeals to the instanced dungeon/raid/PvP model. It's applicable in those areas & complements it. When the game content becomes only that, then you should be worried (let's not turn the game into Vinductus).
There's still the open world too. Where content finder might not work or be limited to just the server you're on.
Assuming SE can even implement content finder correctly. For all we know, they'll half-ass it as usual & it'll be a clunky mess that no one will use.
We're ahead of ourselves anyway. This system won't be out until sometime after 2.0. Best to check back then.
tl;dr
Content Finder won't obsolete Linkshells or Free Company's
We still need good groups for challenging content & friends.
Will help stop the boring AFK in town.
Great for Casuals & anyone looking to just play (esp. to learn content).
Similar to telling people they don't HAVE to PL to 50, we don't have to queue up
We have an Open World. Instances aren't the entire game.
Complain if the devs make the entire RELEVANT endgame only this.
This won't be until after 2.0, check back later.