To Paraphrase:

The UI and servers are still shit. (Coming in 2.0)

The graphics are still horribly unoptimized. (Coming in 2.0)

There's lots more to do.

The Grand Company questline that starts at level 30 will lead you through the story transition into 2.0.

It's easier to level up any class, even gatherers/crafters.

You can ride a chocobo.

Hurry to 50 now and grab a rare drop from one of the primal fights, because you won't ever see them again after 2.0.