More to the topic of Yoshi's postings, I just hope he's mindful of the soloist/low-man endgame. He can say he understands that grouping is stressful, but that says nothing about not forcing it to progress your character come endgame. Doubly so if this group content demands large blocks of uninterrupted time. If the game can manage to keep more casual players from feeling like they're spinning their wheels and getting nowhere, then I'd call it a pretty significant step that other games have dropped the ball on for me.
How are you going to do end game without groups? I think at some point you're going to have to suck it up and join other people.
I think Yoshi already has a good handle on this in that Endgame will allow for the non-lead/support players to be able to still get rewards, by either doing FATEs, which allow you to fight alone, or with a party (alone you have a lot higher risk, and are treated worse by other players at the FATE). As well as low-man dungeon raids (though I haven't heard any of the requirements for any of the end dungeons, but it sounds like the two main ones will be full party).
As well, we will have Free Company rewards and benefits.
I personally know, as a HIGHLY obsessed player, but one who likes to play on my own terms, I spent a year in Sky with ZERO rewards.
Here is to hoping (at least for me) that my understanding of it is accurate. I don't need the same gear that people get from the towers, but something that is worthy.