1) Huge open landscapes to explore. It's not entirely open, as some might prefer, but the 'zones' in this game are massive areas with lots of ground to cover.
Plenty of ground, agreed (except in Black Shroud, where it would be accurately said, plenty of tunnels), but that's it, there's only lots of ground, there's nothing on it, i didn't pay money to play the "Lanscape, the MMO", i wanted a Final Fantasy game (with fun story, humorous characters, and most of all, as i can get all other stuff elsewhere, Chocobos), and seems like i got a skeleton of one (it's like they took a single player FF game, removed almost all the content and put it online).
2) The class system is near-perfect for me. There's no massive drop in stats when you switch from one class to another (So no more being beaten by Ronfaure bunnies when you change to that level 1 job) and the various classes have this wonderful synergy when combined together to make your ideal character.
The Class system is ok for me, altough they should have made changing jobs more fuild, now i have to set my ability bar anew everytime i change combat class, and change my gear everytime i become a crafter (takes forever through ui, and macros seem unable to deal with my +1 pants).
3) Crafting. Okay, this one is a bit controversial I know, but I adore it. You're no longer limited to just two crafts and a bunch of subs. You have your pick of the entire range if you so desired. And while the road to doing so might not be an easy one, you know that the rewards speak for themselves. The various crafting abilities you get makes the hands-on approach more meaningful than using a crystal and praying it doesn't explode on you. You also get skill points even on failed attempts, unlike FFXI where even successful attempts only awarded skill randomly.
Crafting is horrible, without AH we can't get parts unless we know a crafter, spam /shout or make them ourselves, and every craft needs crapton of mats from other crafts to make anything decent.
But dispite that, i kinda enjoy crafting, in theory, if they just removed the horrible RNG, and did not make me spend more time waiting for menus to load than actually, you know, crafting, it might be really good.
For now, i'm giving them until my freetime is up to get themselves up to shape, if they show us that they are committed to improving the problems (and are aware wich parts here are the problems, stop nerfing the crafting already), and capable to do so, i might actually pay for one moth before leaving to do something else.
But mostly, i'm tolerating the game more than enjoying, mostly i play in order to have a decent mid level character to play with if/when they manage to fix issues, and i am bored out of my mind.