I guess all that latency and server side GUI is cuz of having a mmorpg where US,EU and JP can play together.

Are there any other mmorpgs there which has global servers like FFXI and FFXIV?

From what i see this game can never be smooth and fast as WoW.

WoW only handles players from one region and even if you try to play in US server from EU you will lag a lot depending on the server population and time, it will be same as playing FFXIV.