The original FFXIV was incredibly awful, but they have been remaking it into a completely different game from the ground up, with a new UI and everything. So until you have a chance to buy FFXIV gil play at the open beta, or after launch, there's no real way of saying one way or the other currently if you'll like it.
As someone who has played from day 1 of the original game's alpha, I say wait and give it a shot. They're implementing a lot of stuff to please hardcore fans of the series (like Gold Saucer, Crystal Tower, chocobo raising, etc.), as well as a lot of modern MMO elements (player-created UI add-ons, smartphone app, auction house, so on).
The game itself is not bad it's the servers and all the glitches they are not improving the story or anything they're improving the quality of the game. I hear the story is excellent as the gameplay, just too many problems with the online part, and I'm guessing they noticed so they are making a better version called A Realm Reborn.