I just hope the developers have implemented ways for those of us who can't devote large chunks of time to devote our smaller chunks of time to something meaningful.
I think the key to this ultimately lies with the player, and not the developers. A player in that situation decides on what constitutes "something meaningful".
I fall into the camp of a player with limited playing time. Even when I was a bachelor during my early days in FFXI, I didn't feel like it was right for me to commit sufficient playing time to do all of the end game activities and reap the rewards associated with it. Now that I have a wife, a toddler son and another baby on the way, I definitely don't have that kind of time. I knew with FFXI that there were certain kinds of end game content I was never going to experience, and I'm sure that will be the case with FFXIV. And I'm fine with that. To me, a meaningful accomplishment was probably something mundane and trivial to those who lived and breathed end game content on a regular basis.
I'm in the same boat, I just want to have content to experience if its not end game, then something else.
The reason why FFXI had longevity for me was because things could be done solo albeit at a very slow pace. I never reached end game, but I did reach high enough level to see a lot of content I didn't get to see.
In short, because the world was so good(and there were timesinks), I didn't feel bad not getting to the end.
I soloed the Shadowlord, most AF NMs and other challenging things and it was fun.
If 2.0 can allow me to do that(like eventually solo instances) that would be OK!
Or if I can farm Gil, or get lucky with NM drops ( if and when they implement open world NMs) then that's enough for me too.
Ironically like the other poster even though I'm causal I'm occasionally hardcore and if the duty finder works, I'll probably actually be raiding quite a bit, at least at the beginning.