one good thing about FFXI that will always stand out is the opportunity to try out a new class/job without having to reroll and get all your items, fame, etc. all over again.
Downfalls are that, soloing still isnt an ENTIRELY viable option. I think for people who want to play "casually" this is a real downside of the game. I for one, prefer to party, it's a lot more fun and dynamic, but there are days where i wish i could just log on and get some solo exp for maybe 30-40 minutes (often times the time it takes to MAKE a party). Square Enix could implement some pretty simple things:
1.) reduce the exp loss when soloing
2.) perhaps allow soloing, but create a maximum cap or something, perhaps a bonus that makes mobs weaker when soloing for 2hrs (random idea off the top of my head). Or simply make soloing less viable, maybe 2k/hr or 3k/hr. That way people who have time will still choose to solo. Right now if you want to solo, its a lot more limited in what jobs you can choose, and its also somewhat more tedious.
3.) Need a new tanking job, or allow current jobs to tank.
i personally played this game since 2003, but as some would know, only came back recently after a 2.5 yr break (if youd even call it that). I still enjoy the game as much as before, although yes, it does feel like it's lost that "fantasy" sense that used to appeal to me so much. CoP was definitely fun, especially doing promyvion pre-nerf, a good challenge but definitely doable. I quit soon after that though.
every game's end game isnt that wonderful. WoW for one thing, for the most part end-game is pretty repetitive as well and to see the true true endgame, you often have to be in the top guild on the server, which is almost impossible to get into unless you've continually played since release.
its the people that make this game fun, and i think as long as you're the top of person who can make new friends, this game will always be fun. A lot of my old friends and guild mates all quit, but since coming back i've met some awesome people again. Only then would it make wacking crabs and fish in Qufim fun even at 3 or 4 or even 5 in the morning, and that's what makes the game stand out. =)